我把面粉装在金属罐子里以防受潮。

I keep the flour in a metal ___canister to prevent moisture.

化学老师把实验用的粉末装进了金属密封容器里。

The chemistry teacher stored the experimental powder in a sealed metal ___canister.

士兵们小心地将手榴弹装入金属罐中。

The soldiers carefully loaded the grenades into the metal ___canisters.