也许吧。但为了以防万一，我要走第一大道。
Maybe. But I'm going to take First Avenue, just to be on the safe side.
也许你很可能永远也用不到以下的建议——但为了以防万一，把它放在手边吧。
You'll almost certainly never need the following instructions-but just in case, keep them handy.
警方有关人士说：“虽然很难瞒过三星集团的保安设置爆炸物，但为了以防万一，正在搜索普通人可出入的场所。”
Police official said: "It is hard to hide from the security of the Samsung Group to set explosives, but just in case, are searching for ordinary people to access the site."
警方有关人士说：“虽然很难瞒过三星集团的保安设置爆炸物，但为了以防万一，正在搜索普通人可出入的场所。”
Police official said: "It is hard to hide from the security of the Samsung Group to set explosives, but just in case, are searching for ordinary people to access the site."
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