sink below the surface的意思|示意

When the drowning people's mouths are above the surface, they exhale and inhale quickly as their mouths start to sink below the surface of the water.

溺水者的嘴高于水面时，他们迅速地呼气和吸气，因为他们的嘴已开始沉下水面。

Drowning people's mouths alternately sink below and reappear above the surface of the water.

溺水时人的嘴交替地沉没于水下或再出现于水面上。

In a marsh, the surface water can sink slowly down through the soil into the rock below.

在沼泽地里，地表水会通过土壤慢慢地渗透到下面的岩层里。