n.密度；濃度；比重

Mercury has a much greater density than water. 水銀的密度比水大得多。

The density of population in this city is very high. 這個城市的人口密度非常高。

The driver had to stop because the density of the fog made it difficult to see. 由於濃霧使道路很難看清,司機不得不停車。

The next trail would require a slightly higher filling density acid. 在下一次試驗時需要注入比重較高的酸。

The bicapillary pycnometer is a tool for accurate determination of density. 雙毛細管比重瓶是一種用于精確測量液體密度的儀器。