对得起的英文：
not let sb. down
treat sb. fairly
be worthy of

let是什么意思：
v. 允许；让；假设；出租
n. 擦网球

Let it be as you desire.
就按照你的意思办吧。

Let in sheathing.
镶进夹衬板。

He let go of the pole and let it fall.
他松开那根柱子，让它倒下了。

down是什么意思：
prep. 在…下，沿着
v. 下降，打倒
n. 潦倒；羽绒；丘陵

Down with hegemonism!
打倒霸权主义！

The sun is down.
太阳下山了。

Close down autos and you close down steel and rubber.
关掉了汽车工业你也就关掉了钢铁工业和橡胶工业。

treat是什么意思：
v. 对待；看待；医治；处理；探讨；请客
n. 款待；乐趣

Treat other people as you hope they will treat you. —— Aesop
你希望别人如何对待你，你就如何对待别人。——伊索

He was treated with great rigor.
他受到极为苛刻的待遇。

Whose turn is it to treat next?
下次该谁请客了？