all in a (或 the) day's work

(of something unusual or difficult) accepted as part of someone's normal routine or as a matter of course

（特别或困难的事）日常的，家常便饭的

dodging sharks is all in a day's work for some scientists.

对一些科学家来说躲避存心诈骗者是家常便饭。

any day

(informal)at any time

(非正式)任何时候，随便哪一天

they could outfight the police any day.

他们随时都可以打败警方。

at the end of the day

they could outfight the police any day.

他们随时都可以打败警方。

by the day

gradually and steadily

逐渐平稳地

the campaign is growing by the day.

运动日益蓬勃。

call it a day

decide or agree to stop doing something

到此为止

day and night

all the time

日日夜夜，夜以继日

the district is patrolled day and night.

该地区有人日夜巡逻。

day by day

on each successive day; gradually and steadily

一天天地

day by day I grew worse.

一天天地我的情况越来越糟。

day of reckoning

the time when past mistakes or misdeeds must be punished or paid for; a testing time when the degree of one's success or failure will be revealed

清算的日子，报应到来的时刻，最后审判日

don't give up the day job

(informal)used as a humorous way of recommending someone not to pursue something at which they are unlikely to be successful

(非正式，幽默)做好眼下的工作（让某人不要追求不可能成功的事情）

from day one

from the very beginning

从一开始

children need a firm hand from day one.

孩子们从一开始就该严格管教。

have had one's (或 its) day

be no longer popular, successful, or influential

不再风光，不再流行

power dressing has had its day.

包装成权势人物已经过时了。

if he (或 she 等) is a day

at least (appended to a statement about a person's age)

至少（加在关于某人年龄的话语之后）

he must be seventy if he's a day.

他肯定至少有70岁了。

in this day and age

at the present time

现在

not someone's day

used to convey that someone has experienced a day of successive misfortunes

背运日