art. 
1.（非特指的）一（个）
2.（同类事物中）任何一个
3.每一（个）
4.某一种
5.（用于某些物质名词前）一种
6.（=the same）同一（个）
7.（与否定词连用，相当于any）
8.【口】（用于虚拟语气，=have）
pron.【方】
1.他，她，它
2.他们，她们，它们
3.我
abbr.
1.（用于旅行时刻表）arrive
2.（用于日期前）before
英语解释

• (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA
• one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
• any of several fat-soluble vitamins essential for normal vision; prevents night blindness or inflammation or dryness of the eyes
• the basic unit of electric current adopted under the Systeme International d'Unites
• a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation
• the blood group whose red cells carry the A antigen
• the 1st letter of the Roman alphabet

例句

• Dance jazz跳爵士舞
• We shall stave it out,no matter how difficult it may be.不管多么困难，我们一定要奋斗到底。
• Prefer doing to talking喜欢做而不喜欢说
• In this section, we consider transfer pricing in those situations where intermediate markets are strong and well defined.在这里,我们讨论存在明确且竞争激烈的中间市场时,内部转移计价的问题。
• It goes without saying that work without rest will do harm to health. In other words, we had better take sufficient recreation to relax after work.不需说，工作而不休息会对健康有害的。换句话说，我们最好工作后，从事充足的消遣来轻松一下。
• cylindrical gearing圆柱齿轮传动
• When the matriarch dies, one of the oldest offspring takes her place当领头的母象死后，由另一头最年长的后代母象取而代之。
• To one's surprise; to one's amazement使..感到震惊