Definition: a line of cars, trucks, etc. that are moving slowly or not moving at all Level: B1
他们被困在交通堵塞中。
They got stuck in a ___traffic ___jam.
有很多交通堵塞，因此污染严重。
There are lots of ___traffic ___jams, so they are very polluted.
早高峰通勤经常导致市中心交通堵塞。
The morning commute often causes a ___traffic ___jam in the city centre.
