1、 This gives improved retractor blade stability with the mechanical advantage of a lever.
这样增加了牵开翼的稳定性,同时兼具杠杆原理的力学优势.
来源:互联网
2、 Efficiency and mechanical advantage are used to gauge the performance of mechanical machines.
效率和机械的优势正在被用来衡量业绩的机械设备.
来源:互联网