adj.预兆的;凶兆的;自命不凡的;装腔作势的;
例句:
These writers paint a portentous picture.
这些经济作者勾勒出一幅奇特的画面.
He introduced each portentous subject with buoyant enthusiasm.
他热情彭湃地介绍着每个怪异的话题.
I portentous thing to come.
我预感不祥的事情要来到了.