Life has its own evolutionary process.生命有其自身的进化过程。...a period of evolutionary change.演变时期The resemblance of families such as the Verbenaceae and Labiate is the result of evolutionary convergence.科的相似性,如马鞭草科与唇形科的相似性,是进化上的...
In the 1790s Tom Paine taught plebeian radicals that mankind would live in harmony were it not for the vested interest which princes, diplomats and soldiers had in promoting wars to enrich themselves.汤姆·潘恩在18世纪90年代教育平民激进...
This was enough to launch their careers into the stratosphere.这足以让他们的事业平步青云了。Most of the chlorofluoromethanes reside in the lower stratosphere.大多数氯氟甲烷存留在平流层下部.Ozone is formed in the stratosphere and mesosphere by photoch...
Objective To study hysteroscopy on treatment of infertility caused by intrauterine adhesions.摘要目的探讨宫腔镜治疗宫腔粘连并发不孕的疗效.Hysteroscopy can also be used to diagnose intrauterine adhesions.宫腔镜也能诊断宫腔粘连.Skin incisions are not requ...