钻头必须缓慢转动，以保证钻孔平整光滑。The drill should be slowly rotated to ensure a clean hole.打钻和提钻时要保持钻头平稳。Keep the drill steady while it ascends and descends.你得拆开这个钻头。You'll have to disassemble the drill....
By all odds it is the best film of the year.这部电影无疑是今年最好的一部.This plane is the best, by all odds.这架飞机是最好的.This is the coldest day by all odds.这是最冷的一天....
You can see the iridescence on their faces.你可以看到他们脸上的彩虹色。The huge pool of blood in front of her was already assuming the iridescence of coagulation.她面前那一滩血,已经凝结了起来,显出五光十色.The costs of melanin - based plumage and iridesce...