按摩椅的功能非常齐全。

The massage chair has many ___functions.

毕业典礼是学校最重要的正式活动之一。

The graduation ceremony is one of the most important formal ___functions at the school.

心脏的主要功能是将血液泵送到全身。

The main ___function of the heart is to pump blood throughout the body.

这台咖啡机不太正常工作，需要修理。

The coffee machine isn't ___functioning properly and needs repair.