胚胎發育
Animal cells lose their totipotency at an early stage in embryonic development.
動物細胞在胚胎發育的較早階段便失去了其全能性。
Humans are asymmetric animals. Early in our embryonic development, the heart turns to the left. The liver develops on the right. The left and right lungs have distinct structure.
人類是不對稱的動物，在我們胚胎發育的早期，心髒就轉向了左邊，肺則往右長，而且左、右肺具有完全不同的結構。
The results not only provide evidences for the study of early embryonic development mechanism in silkworm, but also give clues for the study of insects diversity.
這一結果不但可以為家蠶胚胎發育調控機制的分子水平研究提供重要參考，也可為昆蟲分化多樣性的分了機制研究提供線索。
Pregnancy is a complicated process, it contains the early implantation of blastocyst and the embryonic development.
妊娠是一個複雜的過程，包括早期的胚胎着床及其之後的胚胎發育。
ADH isozyme was expressed in all stages of embryonic development, but there were differences in enzyme bands and enzyme activities.
醇脫氫酶同工酶在中華絨螯蟹胚胎發育的各階段均有表達，但表達的酶帶數和活性有區别；
Meanwhile the abnormal phenomena from fertilized eggs division, organ forming to hatched larva during each embryonic development stage of hybrid were observed. The malformation rate was 51.8%.
同時，觀察了雜種胚胎發育各時期中自卵裂、囊胚、原腸作用、器官形成至孵出期的發育異常現象，畸形率為51.8%。
An intact death pathway is required for successful embryonic development and the maintenance of normal tissue homeostasis.
細胞死亡通路對于胚胎發育和正常組織穩态的維持是必需的。
The paper deals with the relationships between ambient temperature and speed of embryonic development, death rate , speed of increase of Hynobius leechii.
本文初步研究了環境溫度與東北小鲵胚胎發育速度。 胚長增長速度、死亡率之間的關系。
To start out I'm going to go back to the thinking about development a little bit, embryonic development, and show you a picture here.
作為這節課的開始，我先稍微回顧一下，一些關于發育過程的内容，先說胚胎發育，這裡有張圖。
There are so many important genes on every chromosome that the loss of both members of a homologous pair would be fatal, wouldn’t even get past embryonic development.
每一條染色體上都包含了數量巨大的重要基因，而同時丢失一對同源染色體将是緻命的，生命甚至通不過胚胎發育期。
Human brain plays a crucial role in the life of individual, from embryonic development to growth, maturation and aging.
從胚胎發育到個體生長、成熟、衰老的整個生命過程中，腦組織始終發揮着十分重要的作用。
Human brain plays a crucial role in the whole course of an individual's life, from embryonic development to growth, maturation and aging.
從胚胎發育到個體生長、成熟、衰老的整個生命過程中，人腦始終發揮十分重要的作用。
Much of this process happens during a surprisingly short time and at very early stages of embryonic development.
在胚胎發育的很早期階段，多數步驟都會在一個極短的時間内發生。
The research greatly expanded knowledge about embryonic development as well as aging and disease.
該項研究大大擴展了我們對于胚胎發育以及衰老和疾病的認識。
Effects of light rhythm and light intensity on hatching rate and deforming rate of larvae were not remarkable, but they all delayed or accelerated the embryonic development speed.
不同的光照節律和光照強度對胚胎的孵化率和初孵仔魚畸形率影響不大，但是對胚胎發育速率和孵化時間具有明顯的延滞或促進作用。
Homeobox gene is a sort of regulatory gene which controls embryonic development and cellular differentiation.
同源框基因是一類控制胚胎發育和細胞分化的調節基因。
Any of a group of vertebrates that have an amnion during embryonic development, including reptiles, birds, and mammals.
脊椎動物，羊膜動物：任一種在胚胎發育期間有羊膜的脊椎動物，包括爬行動物、鳥類和哺乳動物。
Objective To investigate the effects of ofloxacin on mouse embryonic development and to determine wether ofloxacin is of reproductive and teratogenic toxicity.
目的研究氧氟沙星對昆明系小鼠胚胎和胎鼠發育的影響，确定其是否存在生殖毒性和緻畸性。
VEGF is essential for embryonic development, endochondral bone formation, female reproductive functions. Substantial evidence also implicates VEGF in tumor and intraocular angiogenesis.
VEGF也是胚胎發育、軟骨内骨形成、女性生殖系統、以及腫瘤和眼球内血管新生所必需的。
Investigation the expression patterns of HAT1 in oocytes maturation and early embryonic development process is of great significance in understanding the genesis of early animals.
因此，研究卵母細胞成熟過程及早期胚胎發育過程中HAT1基因的表達模式，對深入了解動物個體的發生機理具有重要意義。
The experiment brought up interests of students about the biological experiment and enhanced the understanding of the process of animal embryonic development.
該實驗有利于培養學生對生物學實驗的興趣，加深對動物胚胎發育過程的了解。
Fertility and early embryonic development have been investigated in rats and embryo-fetal development has been investigated in rats and rabbits.
研究大鼠的生殖能力和早期的胚胎發育以及大鼠和兔子的胚胎-胎仔發育。
Embryo bisection is a powerful means in the study of cell differentiation, early embryonic development and the totipotency of embryo cell.
胚胎分割是研究細胞分化、早期胚胎發育、胚胎細胞全能性的有力手段。
|fetation;胚胎發育
胚胎發育（Embryonic Development）是指從受精卵形成開始，到主要器官系統基本建立完成的整個早期發育過程。這是多細胞生物體生命周期的關鍵起始階段，為後續的生長和分化奠定基礎。其核心過程包括：
調控機制：胚胎發育受到極其精密的調控：
研究意義：理解胚胎發育對于認識生命起源、先天性畸形成因、幹細胞分化與再生醫學、進化生物學等至關重要。
人類胚胎發育時間框架：在人類中，胚胎期特指受精後的前8周（孕齡10周），此期結束時，所有主要器官系統的雛形均已建立，胎兒期隨之開始。
權威參考資料：
Embryonic development（胚胎發育）是指從受精卵形成到胚胎器官系統基本建立的全過程，是生物體早期發育的核心階段。以下是關鍵要點：
基本定義 胚胎發育始于受精卵（zygote），經曆細胞分裂、分化和組織構建，最終形成具備各器官系統的幼體。在人類中，這一過程通常指受孕後前8周（胚胎期）。
核心階段
該過程在不同物種中具有保守性（如果蠅與人類共享部分發育基因），但具體形态變化差異顯著。更詳細的發育生物學原理可參考《發育生物學》教材或專業文獻。
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