1.signal sth. for sb. 表明
That was a sharp signal for me that I'd better start improving my fitness immediately if I don't want to fall ill again.
这对于我来说是一个紧急信号：如果不想再病倒，我就必须立刻开始提高自己的身体素质Jf.=m;c*|^&FoW。

2.on behalf of 以……的名义
Isaac prayed to the Lord on behalf of his wife, because she was barren.
以撒因他妻子不生育，就以她的名义祈求耶和华9Fa;yM+!r5i%02vIKKHG。

3.raise alarms 敲响警钟
Google's border-straddling scale and its brash ambitions raise alarms with some European politicians.
谷歌的跨国经营规模和它的雄心壮志给欧洲政治家们敲响了警钟FSVBEH;@j+]Y4(dQ@=;。

4.be contingent on 取决于
Who should care for the elderly and how pension systems should be funded are often contingent on cultural norms and preferences.
谁来照顾老年人，应该怎样资助养老金体制两个问题往往取决于文化标准和文化取向e!=fcE~X3mKH=m.z#|i。