New roads are being built to cope with the increased volume of traffic.
 

正在修建新的道路以应付增加了的交通量。

2.by contrast 相比之下

Using a micro-robot, by contrast, might involve only one incision and smaller surgical instruments.
 

相比之下，使用微型机器人可能只需要一个切口和更小的仪器。
 

3.to start with 首先
 

To start with, you need a valuable product.
 

首先，你需要一个有经济价值的产品。
 

4.keep … in check 约束，制止
 

Watch your emotional energy and keep it in check especially in public!
 

注意自己的情绪，并及时控制，尤其是在公众场合！