我不愿戴耳机，因为它可能会使鼓膜穿孔。I refused to wear headphones because they can perforate your eardrums.鼓膜隆起.The tympanic membrane is bulging.我的鼓膜差点震破了.My eardrums are almost pierced....
Have you altered the plans of the projectile as the telegram suggests?你已经按照电报的要求修改炮弹图样了 吗 ?It cut the water like a gigantic and keen projectile.它象颗巨大锐利的子弹飞快地在水中穿行.The path followed by a projectile is called its trajector...