Store the cake in an airtight container.
把蛋糕存放在密封容器里。
Store the cookies in an airtight tin.
将曲奇饼干存放于密封罐中。
Store the peppercorns in an airtight container and grind the pepper as you need it.
将胡椒粒储存在密封容器中，在需要的时候磨成粉。
Mick had an airtight alibi.
米克有确凿的不在场证据。
This means that people going inside must pass through at least two airtight doors.
这意味着：人们要进去的话，至少要通过两道密封门。