衍生灾害的英文：
derivative disasters

derivative是什么意思：
n. 衍生物；导数；派生词
adj. 模仿他人的；衍生的

Something derived;a derivative.
派生派生物；导出物

derivation; descendent
派生物

This is a derivative word.
这是一个衍生词。

Esters are named as derivatives of the acids from which they are derived
酯是作为相应的酸的衍生物来命名的。

We will replace the partial derivative by an ordinary derivative.
我们可用普通微商代替偏微商。

disasters是什么意思：
n. 灾难，不幸；彻底的失败

to meet with disaster; to suffer disaster; to smart for
遭殃

Knowledge of the disaster soon spread.
灾难的消息很快传开了。

Let's forget the disaster.
让我们不要再把那场灾难放在心上了。

Our plan ended in disaster.
我们的计划以彻底失败告终。

The search for truth is a total disaster.
调查事实真相变成了完全的灾难。