silk shark的用法和樣例：
例句
- With a mouthful of three-pointed teeth, the frilled shark may be a fearsome hunter, but it's considered harmless to humans.
滿(mǎn)口的三角牙證明皺鰓鯊是兇猛的捕食者，但科學(xué)家認為它不會(huì )攻擊人類(lèi)。 - Believed to have changed little since prehistoric times, the frilled shark is linked to long-extinct species by its slinky shape and by an upper jaw that is part of its skull.
科學(xué)家認為，皺鰓鯊自史前時(shí)期以來(lái)在外貌上的變化幾乎很少。
