The more the big cat struggles, the deeper it sinks into the black substance.

VOA: special.2010.04.07

Your stomach sinks, you have that sinking feeling in the pit of your stomach, when you get a bad grade on a test.

当你考试考砸的时候,你的胃会垂下去,或者说,会有胃部下垂的感觉

耶鲁公开课 - 死亡课程节选

Weep no more, woeful Shepherds weep no more For Lycidas your sorrow is not dead, Sunk though he be beneath the wat'ry floor, So sinks the day-star in the Ocean bed, And yet anon repairs his drooping head.

诗歌大意：，悲伤的牧羊人们不要再哭泣,利西亚斯并没有死去，虽然他被海水吞没，启明星也会沉入海底，不久便会修复他疲惫的头颅。

耶鲁公开课 - 弥尔顿课程节选

The more it struggles against the black substance, the deeper it sinks.

VOA: special.2010.04.07