if and when中文是什么意思

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中文翻译
造句

如果, 万一

if If they had only arriv ...
when adv. 1.〔疑问〕什么时候，几时。 W- did y ...
a when 具备此语法功能
when adv. 1.〔疑问〕什么时候，几时。 W- did you see him (这以前)你几时见他的？ 2.〔关系，引导定语从句〕当…的时候。 He came at a time when I least expected him. 他在我最想不到的时候来了。 3.从前境况差时。brag of having known sb. when 夸耀自己是某人过去的患难之交[布衣之交]。 1.当…的时候。 2.(刚)…就…。 3.如果。 4.然后。 5.既然。 6.可是，却。 Come when you please. 你高兴的时候来好啦。 I was just going to speak, when the bell rang. 我刚要讲，钟就响了。 Why use wood when you can use plastic 既然能用塑料，何必非用木料？ Please ring me up when she comes. 如果她来了，请打电话给我。 I stayed till noon, when I went home. 我留到中午，然后就回家了。 We have only three books when we need five. 我们要五本书，可是只有三本。 He walks when he might ride. 可以坐车，他却走路。 when all comes to all 结果。 when due 到期时。 when (he was) king 做国王时。 when in position 恢复原位后。 pron. 1.〔疑问〕什么时候。Till when can you stay 你可以待到什么时候？ 2.〔关系〕那时。 They left on Monday, since when we have heard nothing. 他们星期一动身，以后就没有消息了。 n. 时候，时间，日期，场合。 the when and the where 时间和地点。
when there 他都抢着干
when it spins, when it swirls 当世界旋转的时候，当它快速的旋转
when it whirls, when it twirls 当它飞快的旋转，当它极速的旋转
about when 大约何时
as and when required 一有需要就
be the time = when 当…时候…
even when 即使当
hardly …when 刚一……就
hardly…when 刚…就…
if (when) necessary 若有必要
know when 什么时间
no matter when 不管何时; 无论什麽时候; 无论怎样何时; 在哪
only when 引导时间状语从句; 只有当....时; 只有当…..才能
remember when 回想; 记住那刻; 曾经几时
say when 酒斟够了请说一声
sew when the 只到亡羊
since when 什么时候开始的
when accepted 接收时
when and where 时间和地点
when at a glance 当一瞥
when available 有条件时; 有网络信号时

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例句与用法

I don ' t know if you have any plans to be a father , but if and when you have kids , will you encourage them to play football
我并不清楚你有没有计划当爸爸，不过如果你有这打算，当你有孩子之后，会鼓励他们去踢球吗？
On handling major incidents , police have a well - tested , effective mechanism which will only be activated if and when necessary
在处理重大事故方面，警方早已有一套行之有效的应变机制。这个机制，在有需要时，才会启动。
If and when the appeal went to the court of final appeal , that court might take the same view as the basic law committee or it might not
如果整件事上诉至终审法院，无论最终判决如何，都会对市民带来极大的困扰和对司法独立失去信心。
The organizers retain the right to refuse the participation of an exhibitor if and when the display items are judged to be inappropriate for the purposes of the fair
经主办方判断为参展内容与本展会宗旨不相符时，有可能拒绝其参展。
Her principal knows that if and when she does send a student to the office , that she has really made an effort to make things work in the classroom
他的校长知道，如他铁了心要把学生往处室送时，他一定真的已在班级里尽力试过各种方法。
If and when the previously depressed prices of the b - shares converge with those of the a - shares , the residents demand for foreign currencies should return to normal
随a股与b股的价格差距不断收窄，内地居民对外币的需求应该会回复正常。
The non - spil cup is designed so that the beverage it contains , such as milk , etc . , will not spill out if and when the baby drops or knocks the cup over
“不漏杯”设计新颖，不管婴儿何如摆弄，杯中的牛奶等饮料也不会渗漏“婴儿用围裙”
If and when there are threads available in the thread pool and no high - priority item remains to be scanned , each item with a low priority is submitted for scanning
当没有选定高优先级扫描项目,而线程池里面有可用线程时,提交中低优先级项目扫描
One participant suggested that consideration be given to retaining 20 % of seats for foreign nationals if and when the functional constituencies were phased out
有嘉宾建议如果功能界别被淘汰的话，应考虑保留现时百分之二十的议席上限予拥有外国国籍人士。
The police will perform crowd management duties to ensure public safety and will implement temporary traffic arrangements in the vicinity if and when necessary
届时，警方将会实施人群管理措施，以确保公众安全。并在有需要时，在附近实施临时交通改道措施。