particle
n. 微粒, 颗粒, 〈物〉粒子;极少量;小品词
1.There are particles of dust in the air.
空气中有尘粒。
2.There's not a particle of truth in her story.
她讲的没有一句实话。
3.Prepositions and conjunctions are particles.
介词和连词是小品词。
patent
n. 专利, 专利权;专利品
adj. 专利的, 特评的
vt. 获得…专利, 给予…专利权
搭配：take out a patent on sth.取得一项...的专利
hold a patent on 对...拥有专利权
1.The patent runs out in three years' time.
这项专利期限为三年。
2.Edison took out a patent on the light bulb.
爱迪生获得了电灯泡的专利权。
3.An invention is not your own until it is patented.
一项发明直到获得专利后才属于你自己。
perceive
vt. 感觉, 察觉, 理解
搭配：perceive sb. do/doing sth.
1.Did you perceive a red colour or a green one?
你看出来是红颜色还是绿颜色?
2.I perceived that I could not make him change his mind.
我意识到我不能使他改变主意。
periodical
n. 期刊
a.周期的，定期的
1.They have already put out a new periodical.
他们已经出版了一种新的期刊。
2.It's the Britain's best periodical art magazine.
这是英国最好的定期出版的艺术杂志。
