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★capsule ['kæpsju:l] n.容器
★surface ['sə:fis] n.地面、表面、外表
常用短语:on the surface在表面上
the surface of the moon月球表面
the surface of the lake was quite still. 湖面相当平靜。
★layer ['leiə] n.层
★explosive [ɪk'splosɪv] n.炸药
★beneath prep.在……之下
区別:under(在某物的)正下方;below(比某物的位置)还底
{有时还可以表否定的含意not good enough of suitable for someone to do sth. }以下列句
He is beneath my notice.我根本就不注意他。
★vibration [vai‘breiʃən] n.震动
20 vibrations per second一秒钟跳二十次
There is so much vibration on a ship that one cannot write.船上的震动大得使人无法书写。
vibrate v.(使)震动, (使)摇摆
vibrational adj.震动的, 摇摆的