重點講解：
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 顯著地位；重要位置；最前沿；
We are at the forefront of efforts to tackle inequality.
我們處于解決不平等問題的最前線。
3. step up 增加(數量等)；提高(速度、強度等)；
The fundamental interest of every country is to step up consultation and cooperation and keep international trade smoothly flowing.
當前加強磋商、增強合作，保持國際貿易渠道暢通，才符合各國的根本利益。
4. in preparation for 做準備；為……準備；
We will have to collect new material in preparation for the experiment.
我們得收集新資料為實驗作準備。