You can use free of charge, without any functional restrictions and time limits.
您可以免费使用，无任何功能限制和时间限制。
Second, and most important of all, I want to make better use of my free time.
第二点，也是最重要的一点，我希望自己能更好地利用业余时间。
One's free time should be made good use of.
一个人的业余时间应当很好利用。
I need to use all of the free time to learn all.
自己需要利用一切的空闲时间来学习一切。
I think make good use of the free time is really important.
我觉得利用好课余时间是很重要的。
He made use of his free time to learn French.
他利用业余时间学习法语。
He made use of his free time to learn French.
他利用业余时间学习法语。
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