n.密度；浓度；比重
Mercury has a much greater density than water. 水银的密度比水大得多。
The density of population in this city is very high. 这个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. 由於浓雾使道路很难看清,司机不得不停车。
The next trail would require a slightly higher filling density acid. 在下一次试验时需要注入比重较高的酸。
The bicapillary pycnometer is a tool for accurate determination of density. 双毛细管比重瓶是一种用于精确测量液体密度的仪器。
