Least is often considered to be the superlative form of little.
least常被看作little的最高级。
1.PHRASE（数量）至少，不少于You use at least to say that a number or amount is the smallest that is possible or likely and that the actual number or amount may be greater. The forms at the least and at the very least are also used.
...a dinner menu featuring at least 15 different sorts of fish...
至少列有15道不同做法的鱼的菜单
Aim to have at least half a pint of milk each day...
目标是每天至少喝半品脱的牛奶。
About two-thirds of adults consult their doctor at least once a year...
约有2/3的成年人至少每年就医一次。
2.PHRASE（表示真实性或可能性）至少，最不济You use at least to say that something is the minimum that is true or possible. The forms at the least and at the very least are also used.
She could take a nice holiday at least...
最不济她也可以去过一个愉快的假期。
He is at least content that there will be no immediate use of force...
至少他对不会即时使用暴力感到满意。
At the least, I needed some sleep...
起码我得睡一会儿。
3.PHRASE（表示相对于不利条件或糟糕情形）起码，不管怎样You use at least to indicate an advantage that exists in spite of the disadvantage or bad situation that has just been mentioned.
We've no idea what his state of health is but at least we know he is still alive...
我们不清楚他的健康情况如何，但起码知道他仍然活着。
If something awful happens to you at least you can write about it.
如果你遭遇了不幸，至少你有东西可写。
4.PHRASE（表示更正或改变自己刚说过的话）至少，起码You use at least to indicate that you are correcting or changing something that you have just said.
It's not difficult to get money for research or at least it's not always difficult...
争取到研究资金并不难，起码不总是那么难。
The police say his death was an accident, officially at least...
警方说他的死是个意外，起码官方消息如此。
They didn't actually like the magazine very much, but they bought it or, at the least, borrowed it from each other.
他们其实并不怎么喜欢这本杂志，但还是会买，或至少会互相借着看。
Someone I least expect, I expect.
我期待的最少的人,我却期待着。
Sycophancy was the device of the least trustworthy.
阿谀奉承之辈最不可靠。
Provided by jukuu
Fourth, and least likely: life on titan!
第四，最小可能性：土卫六真的发现生命！
article.yeeyan.org
However, these remained the least well understood asset classes.
不过，这些仍然是人们了解最少的资产类别。
Food is recession-resistant, and farming has been one of the sectors least affected by the worldwide slump.
粮食是抗衰退的，而农业是受世界性经济滑坡影响最小的板块。
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