做真题练习
我的生词本
在线背单词查词历史
邻近单词
词形变化: a's
- 正在加载“a”的释义
例句用法 短语词组 近反义词 海词讲解 英英解释
正在加载a的相关例句
- with a pinch of salt stand a chance
- a dose of one's own medicine flog a dead horse
- keep a stiff upper lip a bag of bones
- once in a blue moon show a clean pair of heels
- birds of a feather with a grain of salt
- bring to a stand turn over a new leaf
- as a matter of fact bring to a standstill
- turn up again like a bad penny at a loose end
- throw a fit blow a fuse
- cut a poor figure take something with a grain of salt
名词 a:
1.
a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
2.
any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
3.
one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
4.
(biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
同义词:adenine
5.
the basic unit of electric current adopted under the Systeme International d'Unites
6.
the 1st letter of the Roman alphabet
缩略词
微课堂，人生如课堂，我们有时候是学生，在课堂上学习知识；有时候是老师，与他人分享经验。在学习和分享中，我们不断成长。
