鳃裂

gill slit───腮裂

call slips───借书证；（图书馆借书时填写的）借书单

gill nets───刺网

gillflirts───打情骂俏

pillow slips───枕套(pillowslip的复数)

drill ships───钻井船；教练船

hill starts───坡道起步

It is thought that these grooves help to channel water through the mouth and out the gill slits, thereby reducing water resistance.───这写凹槽应该是起一个引导水流入口再从鳃裂流出的作用，因此可以降低阻力。

With its enormous mouth and gill slits wide open, it can sieve through thousands of gallons of seawater every hour.───它那巨大的嘴和腮裂大大地一张，每小时可以吸进数千加仑的海水。