The antibiotics are not for you at all.抗生素却完全不是

at all完全； 根本

I assure you that you will feel no pain at all.

我保证你根本不会觉得疼的。

I don't think that's a bad idea at all.

我看这完全不是个坏主意。

They're aimed at the bugs,它们作用于病原

aim at瞄准； 目的在于

A stationary target is easiest to aim at.

静止的目标是最容易瞄准的。

We must aim at increasing/to increase exports.

我们要力求增加出口货物。

the less effect it has on you.对人体的作用就越少

effect on对 ... 的作用

Punishment had very little effect on him.

惩罚对他没有什么效果。

Alcohol has a very bad effect on drivers.

酒精对司机的影响很大。