check into

US /tʃek ˈɪntuː/

UK /tʃek ˈɪntuː/

入住, 办理登机手续

to register at a hotel or airport

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We need to check into the hotel before 3 PM.

我们必须在下午3点前入住酒店。

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Passengers are advised to check into their flights at least two hours before departure.

建议乘客在航班起飞前至少两小时办理登机手续。

调查, 查明

to investigate or examine something

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The police are checking into the suspicious activity.

警方正在调查可疑活动。

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I need to check into why the system crashed.

我需要调查系统崩溃的原因。