put sb on his guard 使某人提防 ; 使某人提防〔警惕
put someone on his guard 劝某人警惕
put on his guard
提防他
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Texas Gov. Rick Perry put 7, 500 National Guard members on standby Tuesday, his office said.
CNN: Nervous Texas braces for Ike
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