热力学是很难教的一门课。Thermodynamics is a hard course to teach.学券会增加不平等,因为最难教的孩子将会被甩在后面.Vouchers would increase inequality because children who are hardest to teach would be left behind....
Shortly after implantation the blastocyst wall, the trophoblast, consists of two layers of cells.植入之后不久,胚囊的壁, 即滋养细胞含有两层细胞.Microchips are convenient, safe, and reliable. Implantation is simple and routine.微芯片是方便 、 安全和可靠的....
the containment of the epidemic对流行病的控制Your list might include such things as cost containment, quality, or customer satisfaction.你的清单上应列有诸如成本控制 、 产品质量 、 客户满意程度等内容.Insularity and self - containment, it is argued, go hand ...