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
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。