These developments forebode disaster. 

这些情况预示着会有灾祸

Black clouds forebode a storm.

乌云预示着有暴风雨。

Those black clouds forebode rain.

乌云是风雨欲来的前兆。

These developments forebode disaster.

这些情况预示著要有灾祸。

Hair is withered and yellow, lusterless forebode incomplete iron and be short of vitamin b.

头发枯黄、无光泽预示缺铁和缺乏维生素b。

Such attacks are generally the aftermath of a class I attack, and forebode class 3 attacks.

这类攻击通常在第一类攻击之后，也是第三类攻击的预兆。