由于存在着危险的下层逆流，在大部分海岸线附近游泳都不安全。Dangerous undertows make swimming unsafe along most of the coastline.那男孩逆流游去.The boy was swimming in a direction contrary to the current.我们逆流向上游游去.We swam upstream against the current....
The flexure hinge mechanism is the key part of the inchworm type of X - Y - θ micro stage.工作台的核心部件柔性铰链传动机构采用对称设计,有利于运动的 导向.The home is the hinge on which family life turns.家庭生活要有个家才能维系.Main Products: Door Bottom , Door S...