1.crack 使...破裂
He cracked his head on the pavement and was knocked cold.
他一頭撞到人行道上,不省人事了 。
2.infection 感染
Cholera is a bacterial infection.
霍亂是一種細菌感染 。
3.cancel 取消
Many trains have been cancelled and a limited service is operating on other lines
多趟列車被取消,其他線路上運行的班次也很有限 。
4.negative 消極的
The weakest students can end up with a negative score.
最差的學生可能會以負分收場 。