liquid rigidity

例句：

1. 1.The liquid in the bottle is clear.
   瓶子里的液体是清澈的。
2. 2. The liquid expands when heated.
   液体在加热时会膨胀。
3. 3.The liquid level has risen due to the addition of water.
   由于加入了水，液体水平已经上升了。