英语听力精选进阶版 14387（在线收听）

Paris smog

Vocabulary

monitoring

checking or watching something to find out what happens

even-numbered

even numbers are numbers that can be divided by two (eg: 2, 4, 6); odd numbers are those in between (eg: 1, 3, 5)

hybrid vehicles

cars, lorries, vans or motorbikes with engines that use two or more kinds of power

noticeable

easy to see

inconvenience

difficulty; something which causes extra time or effort to do something

the stakes are high

there is a lot of risk