图书馆对学生不收费，可以免费借书。

Túshūguǎn duì xuésheng bù shōufèi, kěyǐ miǎnfèi jièshū.

The library doesn’t charge students; they can borrow books for free.

因为场地有限，这次讲座需要提前报名并收费。

Yīnwèi chǎngdì yǒuxiàn, zhè cì jiǎngzuò xūyào tíqián bàomíng bìng shōufèi.

Because the space is limited, this lecture requires advance registration and charges a fee.

这个手机软件前三个月不收费。

Zhège shǒujī ruǎnjiàn qián sān gè yuè bù shōufèi.

This mobile app is free for the first three months.