the density of a gas一种气体的密度Mercury has a much greater density than water.水银的密度比水大得多.Astronomers know that Pluto and Triton have nearly the same size, mass, and density.天文学家知道冥王星与海卫一拥有几乎相同的体积、质量与密度。...
他们打卡下班，于2点50分离开。They clocked off duty and left at ten to three.值夜班的警员准备打卡下班。The Night Duty Officer was ready to clock off.他们到了工厂准备打卡上班，却发现大门没开。They arrived to clock on and found the factory gates locked....
He has acquired a reputation as this country's premier solo violinist.他已经赢得了该国首席小提琴独奏家的名誉。The club are on the brink of promotion to the Premier League.俱乐部即将晋级超级联赛。The premier occupies the foremost place in the world...
We watched the cow suckling her calves.我们看了奶牛如何给小牛喂奶。Chymosin used traditionally in cheese making is an aspartic protease extracted form abomasum of suckling calves.传统干酪加工中使用的凝乳酶是从犊牛皱胃中提取出的一种天冬氨酸蛋白酶.The calves were reall...
Near the end of Devonian times, thirty percent of all animal life vanished.在泥盆纪末期，30％的动物物种都灭绝了。The contact relationship between Silurian and Devonian is parallel unconformity.泥盆系与志留系之间为平行不整合接触.Blooming of Bacteria and Al...