我们通过下面的两个例句来详细了解check out的'用法：
例句：
I forgot to take my luggage after I checked out. Fortunately, the receptionist kept it safe for me.
在结账退房之后，我忘记拿行李了。幸亏接待员帮我保管完好。
After the mechanic checked out the battery, he told me I need to buy a new one.
在修理工检查完电池之后，他说我需要买个新的。