guarded
[ˈgɑ:rdɪd]
adj.
谨慎的，有保留的;
v.
保护，控制( guard的过去式和过去分词 );
例句:
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He is being guarded by a platoon of police.
有一队警察看守着他。
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Environmental groups have given a guarded welcome to the Prime Minister's proposal.
环保组织对首相的提议表示谨慎的欢迎.
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In the office, Dr. Lahey seemed less guarded, more relaxed.
莱希博士在办公室里看起来没有那么谨小慎微，放松了许多。
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In France, the response would be more guarded.
来自BBC
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They greeted the news from Geneva with guarded optimism.
来自VOA
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Cycling organisations gave a guarded welcome to the announcement.
来自THETIMES