You must use commas properly in writing.
你写文章时得正确使用逗号。


They're too fat to walk properly so they roll.
他们肥得不能正常走路，所以只能往前滚了。

VERB. 使震惊;使惊呆;使惊愕;使神志不清. If something stupefies you, it shocks or surprises you so much that you cannot think properly for a while.

One of the most critical requirements for properly functioning software is clean data.

软件能够正确无误地运行离不开正确的数据，这是至关重要的。