2 sentences

1. 两小时后将水排出。

   liǎng xiǎo​shí hòu jiāng shuǐ pái chū.

   Drain the water after 2 hours.

   Source: CCMatrix

2. 要在水下停留的关键是不要屏住呼吸，而是要让所有的空气排出。

   yào zài shuǐ​xià tíng​liú de guān​jiàn shì bù​yào bǐng zhù hū​xī, ér​shì yào ràng suǒ​yǒu de kōng​qì pái chū.

   The key to staying underwater is not to hold your breath, but to let all the air out.

   Source: CCMatrix