1. （行为）严厉的，极端的
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;If you have to take drastic action in order to solve a problem, you have to do something extreme and basic to solve it.

2. （变化）激烈的，巨大的
[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;A drastic change is a very great change.

1. forceful and extreme and rigorous

[…]nbsp;[…]nbsp;[…]nbsp;[…]nbsp;e.g. drastic measures