词汇表达

two-edged sword/double-edged sword 双刃剑

cut both ways 有利有弊；反之亦然，正反皆能说通

every coin has two sides 凡事都有两面性

拓展训练

1.We are also awaked to know at every moment, science and technology is a "two-edged sword".

我们也时刻清醒地认识到，科技是把“双刃剑”。

2.But the speed and ease of communication cut both ways.

不过，通信的速度和舒适性也是双刃剑。

3.Every coin has two sides, and we are no exception.

事物都有两面性，我们也不例外。