Barium is found in some oilfield brines in concentrations greater than 100 mg / litre.在有些油田卤水中,钡的浓度大于100毫克/升.At lower concentrations they may even be stimulants of cell division.在浓度较低时,它们甚至能促进细胞分裂.Methods Three different...
In heavy concentrations, ozone is irritating to the eyes, nose and throat.高浓度的臭氧会对眼睛、鼻子和咽喉有刺激作用。Large concentrations of capital were in the hands of merchants.大量资本集中在商人手里.The latest data showed that global ozone concentr...
心皮是由大孢子叶两边愈合进化而来的.It has evolved by fusion of the two edges of the megasporophyll.孢子异型:指植物产生两种大小不同的孢子: 小孢子和大孢子.Heterospory The production of two different sizes of spore: microspores and megaspores.通常较大的大孢子含有更多的贮藏养料.The ...
Your life since then must have seemed very ordinary.你的生活从那时起一定非常平淡无奇。Since then, the authorities have tried to clean up the sport.从那以后，有关当局已努力整顿体育界。Since then I've been waiting on events.自那以后，我就一直在观望事情的发展。...
这俱乐部被知识分子小集团把持着.The club is dominated by a small clique of intellectuals.他的指示就是军令, 从 “ 小集团 ” 一直下达到成百上千的工作人员.His orders were commands, passed down from the " ring " to its hundreds or thousands of workers.这种核心小集团存在下来,是由于施...