重点讲解：
1. under control 被控制住；得到控制；
The epidemic has been brought under control.
疫情已得到控制。
2. at the forefront of 显著地位；重要位置；最前沿；
We are at the forefront of efforts to tackle inequality.
我们处于解决不平等问题的最前线。
3. step up 增加(数量等)；提高(速度、强度等)；
The fundamental interest of every country is to step up consultation and cooperation and keep international trade smoothly flowing.
当前加强磋商、增强合作，保持国际贸易渠道畅通，才符合各国的根本利益。
4. in preparation for 做准备；为……准备；
We will have to collect new material in preparation for the experiment.
我们得收集新资料为实验作准备。