重点讲解：
1. reflect on 沉思；深思；
It is important to reflect on the reasons for this.
反思这种现象产生的原因很重要。
2. in line with （与…）一致；（与…）相符；
The products meet national and EU environmental standards, in line with international environmental requirements.
该产品符合国家和欧盟环保标准，符合国际环保要求。
3. in the wake of 随着…而来；作为…的结果；
There were heavy losses of property in the wake of the flood.
洪水给财产造成重大损失。
4. unaccounted for 下落不明；失踪；
At least 300 civilians are unaccounted for after the bombing raids.
遭轰炸袭击之后，至少有300名平民下落不明。