jiàoliàn / xiān / xiàng / wǒmen / jiǎngjiě / shuǐ / fèi / de / shǐyòng / fāngfǎ / hé / ānquán / guīzé

教练先向我们讲解水肺的使用方法和安全规则。

The instructor first explained how to use scuba equipment and the safety rules.