It appears necessary to learn something useful to protect the family from them.
学习一些有用的东西来保护家庭免受它们的伤害似乎是很有必要的。
I will learn something useful.
我要学习一些有用的东西。
想要做些有用的事吗？
"I want to do something useful," he said.
“我想做一些有用的事儿，”他说。
Try to find something useful to do.
尽量找些有意义的事情做。
There may be something useful inside.
可能有一些有用的东西在里面。
Can't you find something useful to do?
难道你就不能找点有益的事做吗？
I want to do something useful with my life.
我想毕生做些有益的事。
I will study. I will learn something useful.
我会学习，学一些有用的东西。
They may happen to do something useful.
语言学家可能恰好做了某件有用的事情。
What counts is offering something useful.
重要的是提供一些有用的东西。
He always wanted to make something useful.
他一直希望能做一些有益的事情。
Really? I suppose that is something useful.
真的吗？我想那些东西还是有点用吧。
I want to study something useful in school.
我希望在学校学些有用的东西。
The presents are usually something useful .
礼物通常是一些有用的东西。
At least you'll have done something useful that day.
至少你在那天做了很有意义的事。
Please stop hanging about and do something useful.
请停止闲逛而做些有益的事。
He stopped hanging around and did something useful.
他不再东荡西逛，而是做了些有益的工作。
Try to channel your abilities into something useful.
设法把您的才能引到有用的事情上去。
If he does something useful, he will save the money.
如果他做点有用的事就会省下钱。
Don't moon about and do something useful for a change!
别闲荡了，改变一下，做点有用的事吧！
We should aim at doing something useful to the society.
我们应当志在做一些对社会有益的事情。
We should aim at doing something useful to the society.
我们应着眼于做一些对社会有益的的事。
We can feel that we're actually doing something useful.
我们可以感觉到，我们确实是在做有用的事。
Rather, we want to provide something useful and educational.
相反，我们希望能提供一些有用的和教育。
I mean, come on, use that giant brain for something useful.
我是说，托付，把大脑用对当地。
Just for today, I will study. I will learn something useful.
就为了今天，我会学习，学一些有用的东西。
We should learn from them to use wind to do something useful.
我们应该向他们学习利用风来做些有用的事情。
We should learn from them to use wind to do something useful.
我们应该向他们学习利用风来做些有用的事情。
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