O : If you write the postcode, it will be helpful.如果你写上邮编, 它会是有帮助的.During the war his pacifist leanings were not helpful.战时他的和平主义思想派不上用场。It was advice of a kind, but it wasn't very helpful.这是一种建议, 但并不非常有用.The staff ...
Having the right equipment at hand will be enormously helpful.手头上有合适的设备将会帮上大忙。An A to Z of careers gives helpful information about courses.按字母顺序排列的职业大全提供了有助于课程选择的信息。During the war his pacifist leanings were not helpful.战...
Fulminic acid can be regarded as the simplest oxime.雷酸可以看作是最简单的肟.An explosive salt of fulminic acid fulminate of mercury.雷酸形成的一种盐或酯.The salts of fulminic acid differ basically isocyanic acid and its trimers.雷酸盐基本上不同于异氰酸盐...