英语听力精选进阶版 13694（在线收听）

Great Barrier Reef under threat

 Vocabulary

delegation

people sent to act as representatives

mining

process of digging into the ground

expansion

the process of spreading out

coal

black rock used for energy

imposed

put into place

marine

relating to the sea

ensure

make certain

suspend

stop for a short time

review

report into something

carried out

made to happen