指甲是生长在手指头尖端的细薄角质物.Nails are thin horny growths at the ends of the fingers.这架飞机有一套尖端的电子导航系统.The airplane has a sophisticated electronic guidance system.刺:叶特化成为具有锋利尖端的结构.Spine A modified leaf reduced to a sharply pointed s...
take the contagion得传染病They have been reluctant to admit AIDS patients, in part because of unfounded fears of contagion...他们一直不愿接纳艾滋病患者，部分原因是无来由地害怕被接触传染。They have been reluctant to admit AIDS patients, in part because of ...
The fossils at Dinosaur Cove are embedded in hard sandstones.恐龙峡谷中的化石都嵌在坚硬的砂岩中。Oftentimes, these fossils are not made available to science at all.科学界常常压根接触不到这些化石。fossils over two million years old两百多万年的化石...