coral reef
(n) a ridge of rock in the sea formed by the growth and deposit of coral- rạn san hô
food chain
(n) a series of living creatures in which each type of creature feeds on the one below it in the series- chuỗi thức ăn
run out
(vphr) be used up or finished- hết sạch
break down
(vphr) to divide into parts to be analysed- phá vỡ
natural disaster
(nphr) a natural event such as a flood, earthquake, or hurricane that causes great damage or loss of life- thảm họa tự nhiên, thiên tai
recycle
(v) to treat things that have already been used so that they can be used again- tái chế
threat
(n) the possibility of trouble, danger or disaster- mối đe dọa
disappearance
(n) the fact of being lost or impossible to find- sự biến mất
cause ... to
(v) to make something happen, especially something bad or unpleasant to st- gây ra cái gì cho...
depend on
(vphr) to rely on somebody/something and be able to trust them- phụ thuộc vào, dựa vào
unexpectedly
(adv) in a way that surprises you because you were not expecting it- bất ngờ, không mong đợi
