1.signal n.信号，暗号

That signal may prompt greater wariness from neighbors.
这个信号可能会让邻国更加戒备。

Red appears to signal rank in virtually all cultures.
红色在几乎所有的文化中都有着等级的标志。

2.harmonious 和谐的，融洽的；协调的

It wants to keep syria secular and religiously harmonious.
他们是想让叙利亚社会、宗教两和谐。

This will re-establish their faith in the harmonious world we're trying to build for our children.
他们会因此重建对这个和谐的世界的信心，这也正是我们努力为孩子营造的和谐世界。

3.outburst 爆发；破裂

See every opportunity for an outburst as a test.
把每次要爆发的机会看作是一个测试。

The outburst of pro-beijing sentiment among overseas chinese has been dominated by students, many of whom are living abroad only for a short time.
在海外华人中迸发的、支持中国政府的情绪，主要是集中在留学生当中，其中很多人只在海外生活了较短的时间。

4.shaky 摇晃的；虚弱的；不可靠的

For many, self-esteem is shaky at best.
往好了说，很多人的自尊心是不可靠的。

The shaky finances of some municipalities could put what's left of the industry to another huge test.
一些市政府不稳固的财务状况可能使这个行业剩下的公司面临另一个巨大的考验。