但是，你在查询或更新部分值时是很低效。

But it is inefficient when you are only interested in querying or updating part of a value, among other disadvantages.

youdao

这样很低效，而且你会经常把东西拿起来然后晚些时候再放回去。

It's inefficient and you'll constantly find yourself having to pick things up just to bring them back out later.

youdao

当你经常试图训练你自己时，你会感到很糟糕，很低效。

And when you are constantly trying to discipline yourself, you will feel worse and be less productive.

youdao