记得每周给冰箱除霜一次。

Remember to ___defrost the refrigerator once a week.

我通常提前把肉从冰箱拿出来解冻。

I usually take the meat out of the freezer to ___defrost it in advance.

冰箱里的冰开始融化后，我不得不清理积水。

I had to clean up the water after the freezer ___defrosted.