Press down on knob and turn clockwise one fullturn to properly engage threads on stem boss.
将旋钮压下，顺时针旋转一整圈，使其完全嵌入到阀杆轮箍的螺纹里。
2
It forms these arches because when the wheel has rotated by a fullturn, then you're basically back at the same situation, except a bit further along the route.
它形成这些拱形，是因为车轮完整的转动了一圈，然后就回到了原处，除了移动了一段路径。
3
The fighting is threatening to turn into full-scale war.