Unexpectedly, female cuckoos also came to the party, seemingly jealous about an apparent rival in their patch, he said.

他说，出人意料的是，雌性杜鹃也来参加这场派对，她们似乎为自己的领地上出现一位明显的对手而感到嫉妒。

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EXAMPLE: Yesterday when I visited the office of my friend unexpectedly, I saw he was busy talking with someone, so I just said to him 'I'll catch you later! 'and went away.

昨天，我出其不意地访问我朋友的办公室，看到他正和别人说话，我只得对他说“以后再找你”，然后就离去了。

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Jeff Tjornehoj, senior research analyst for Lipper, cautioned that Vanguard's fund could lose out should Treasury yields rise sharply and unexpectedly in the future, though he said yields are unlikely to jump any time soon given the uncertainty about the euro zone and the global economic outlook.

WSJ: Vanguard Bond Index Fund Beats Stars Bill Gross, Dan Fuss