Why are these two existential checks bad?
这两个存在检查为何不好？
Two plans to carry out special security checks.
二要有计划开展专项安全检查。
Checks have two important advantages over cash.
比起现金，旅行支票有两个重要的优势。
There are two self checks that the system performs every time the vehicle is started.
每当汽车启动时，会进行两项自检。
There are two self checks that the system performs every time the vehicle is started.
每当汽车启动时，会进行两项自检。
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