英:/'twaɪs/ 美:/'twaɪs/
兩次
初中,高中,CET4,CET6,考研
adv. 兩次；兩倍
This is a semimonthly magazine, which means it is published twice a month.
這個雜志是半月刊，即一個月出版兩本。
His salary is twice as much as mine.
他的工資是我的兩倍。
I advise you to think twice before dropping out of school to work.
我勸你在辍學去打工前三思。
The state is at least twice as big as England.
這個州至少是英格蘭的兩倍大
He feeds his dog twice a day.
他每天喂兩次狗。
I dress up twice per year.
我一年會盛裝打扮兩次。
My friend had to charge her phone battery twice yesterday because she used it all day.
我朋友的手機要一天充兩次電，因為她整天都在用。
I swiped my card twice before I realized it was the wrong one.
我刷了兩次卡，然後意識到不是這張卡。
In many Western countries, people get paid twice a month.
在許多西方國家，人們一個月拿兩次工資。
I walk my dog twice a day.
我每天遛兩次狗。
I was late twice last month, so my boss deducted money from my salary.
上個月我遲到了兩次，老闆扣了我工資。
I went to Anna's house twice last week.
上周我去了Anna家兩次。
A: How often do you eat noodles? B: Twice a week.
A：你多久吃一次面條？ B：一周兩次。
I try to go back home twice every year.
我盡量每年回家兩次。
She gets paid twice a month: on the 1st and 15th of the month.
她每月拿兩次薪水：每月的1號和15號。
I play once or twice a week. What do you do on weekends?
一周一兩次。你周末一般都做什麼？
I go home twice a year, so I see them then.
我一年回家兩次，那個時候看他們。
She charges 20 RMB per hour. She can come once or twice a week.
她一小時收費20，她一周可以來一到兩次。
Probably twice a week. Once on a weekday and once on weekends.
大概一周兩次。工作日一次，周末一次。
Well, I have lectures twice a week and class discussion once a week via video.
嗯，我每周有兩次講座，每周通過視頻進行一次課堂讨論。
She's backpedalled twice already.
她已經兩次改變主意了。
I go swimming twice a week.
我每星期遊泳兩次。
The villa is cleaned twice a week.
這棟别墅一周打掃兩次。
Cats sleep twice as much as people.
貓睡覺的時間比人長一倍。
I visited once or twice.
我參觀過一兩次。
twice a week
每周兩次
think twice
再三考慮；重新考慮
think twice about something
三思而後再決定做某事
think twice about
仔細考慮，重加考慮
at twice
adv. 在第二次時；分兩次
"twice" 是英語中表示數量關系的副詞，核心含義為兩次或兩倍。該詞源自古英語"twiga"（雙重）和中古英語"twies"（兩次）的演變，現廣泛應用于日常生活、數學計算和文學表達三大領域。
在基礎用法中，"twice" 用于描述重複發生的動作頻次，例如："The committee meets twice a month"（委員會每月召開兩次會議）。此時其強調精确的數量關系，區别于"again"（再次）的模糊性表述。根據《牛津英語詞典》釋義，作頻度副詞時其數值優先級高于"often"而低于"thrice"。
數學語境下，"twice" 對應乘法運算公式：
$$
2 times x = text{twice }x
$$
該用法在商業場景尤為常見，如"twice the original price"（原價的兩倍）。《劍橋英語語法指南》特别指出，當與比較級連用時需保持結構完整，如正确表述應為"twice as expensive as"而非"twice more expensive"。
文學創作中，該詞常構成隱喻性表達。莎士比亞在《第十二夜》中寫有"Journeys end in lovers meeting, Every wise man's son doth know. What is love? 'Tis not hereafter; Twice as sweet as answer'd groans"，此處"twice"既強化情感濃度又形成韻律節奏。
該詞存在多個近義詞但語境適用性不同："double"側重數量翻倍，"twofold"多用于抽象概念，"bis"屬專業術語常見于樂譜指令。語言學家David Crystal在《英語的故事》中強調，現代英語中"twice"在口語使用頻率是"two times"的3.2倍。
詞性：副詞
發音：
次數表達：
倍數關系：
搭配結構：
習語與固定短語：
語法限制：
次數用法：
倍數用法：
習語場景：
| 詞彙 | 釋義 | 場景 |
|---|---|---|
| once | 一次 | 頻率表達（once a day） |
| thrice | 三次 | 古英語用法，現較少見 |
| double | 雙倍的 | 形容詞或動詞（double the recipe） |
| half | 一半 | 對比倍數（half as much） |
如需進一步了解數詞用法（如基數詞、序數詞），可參考數詞分類指南。
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