1. occur vi.发生; 出现
例句:Earthquakes occur frequently in this area.
这一地区经常发生地震。
2. detonate vt.(使) 爆炸,引爆
例句:Police said they believed the aim was to detonate explosive devices smuggled on board the aircraft in hand luggage.
警方表示,他们认为,恐怖分子的目标是引爆混在手提行李中,偷偷带上飞机的爆炸装置。
3. identity n.身份
例句:We call O the additive identity.
我们称O为加性单位元素。
4. blast vt.击毁,摧毁; 尖响
例句:They' re trying to blast away the hill to pave the way for the new highway.
他们试图炸掉这座小山丘为新公路通过。