buy time拖延时间                                                         He tried to buy time by talking a lot

by and large 大体上来说                                            flowing pedlar流动小贩

i got this book from flowing pedlar

put up秘密安排某事                                                   the appointment of the new director was put up

we found a colony of ants under the tree.                  表示群体时，group指人或物，colony指生物群体

The latest census shows that chinese's popluation exceeds 1.2 billion

surpass和exceed都指超过，但出现具体数字时要用exceed

I have no illusion about（his ability）我对xx不抱有幻想

Be effcient while keeping a low profile高调做事低调做人

make a reservation              under the name of

how do u like ur steak cooked?

rare三分熟            medium-rare四分数        medium五分熟     medium-well七分熟         well-done全熟

bill ，please.买单

stay up late睡得晚，熬夜， night person夜猫子

I have a hangover宿醉