重点讲解：
1. be subject to 受…支配的；服从于…的；
We are subject to the laws of the country.
我们受国家法律的约束。
2. on top of 另外；加之；除…之外(还)；
On top of that, I've got one extra bit of good news I think you might want to hear.
除此之外，我还有一个你想要听到的好消息。
3. in place （法律、政策、行政体系等）正在运作，就位；
But Europe, with its tight regulations and a carbon-trading program in place, may not be achieving all that it intends.
但是，监管严格、碳交易计划实施到位的欧洲，也许并没有实现其所有意图。
4. when it comes to 谈到；涉及；
When it comes to photography, I'm not an adept.
要说照相，我不是内行。