1. If you continue to weave in and out of traffic, you'll get caught by the police.2. If you are sailing against the wind you have to zigzag your way to move forward.
 weave in and out of traffic zigzagweave in and out of traffic = 開車時穿來穿去，像蛇行一樣zigzag = 形容又向左又向右的動作
His family seems happy and united, but it's all a chrade.