Another problem with hg is loss during sample preparation .

汞还有另外一个问题，就是在制样时候的损失。

They found the men increased their systolic blood pressure by 6 mm hg and diastolic blood pressure by about 3 mm hg .

他们发现参试者收缩压提高了6毫米汞柱，舒张压提高了3毫米汞柱。

G is in the center of g means gh = hg for any h.

g在群g的中心，意指对任意h，都有gh=hg。

Last week google put paid to speculation about the meaning of three " unexplained phenomena " doodles by admitting that they were designed to commemorate the 143rd birthday of the novelist hg wells .

上周，谷歌结束了几周以来人们对其此前发布的三个“神秘图标”的种种猜测，坦称这三个图标是为了纪念小说家赫伯特乔治威尔斯143岁诞辰而设计的。

Leaf is main accumulation organ for hg .

叶是两种沉水植物积累转移汞的主要器官。