Its own elliptic motion around it will be almost imperceptible.它绕着质心的椭园运动就几乎看不出来.His head moved in an almost imperceptible nod.他点头的动作微小得几乎看不出来。She answered with an almost imperceptible nod of the head.她几乎不为人察觉地点了一下头作为回答。...
They were good catalyst for synthesis of n - butyl cinnamate.它们是催化合成肉桂酸正丁酯的良好催化剂.Butyl cinnamate was synthesized from cinnamic acid and butyl alcohol using tungstosilicic acid as catalyst.以钨硅杂多酸为催化剂,通过肉桂酸和正丁醇反应合成肉桂酸正丁酯.M...
他将文件叠起来，塞进自己的书桌抽屉里。He folded the papers and stuck them in his desk drawer.壁橱最下面的抽屉里还有一条多余的毯子。There's an extra blanket in the bottom drawer of the cupboard.他查看了一下收银机的抽屉，里面有钱。He checked the register. There was money i...