高中英语 Unit 2 Cloning 单词复习导入2课件 新人教版选修8.ppt

Words Review * . Read the explanation and speak out the word it explains. * based on chance rather than being planned or based on reason to get sth., especially by asking for it, buying it, working for it or producing it from sth. else an important discovery or event that helps to improve a situation or provide an answer to a problem breakthrough n. 突破 procedure n. 程序；步骤；手续 obtain vt. 获得；赢得 arbitrary adj. 任意的 a set of actions which is the official or accepted way of doing sth. * a change made to sth. in order to correct or improve it, or when you make such a change to do or begin to do sth., especially sth. that will take a long time or be difficult commercial adj. 商业的；贸易的 undertake vt. 着手；从事；承担 medium n. 媒介；手段；工具 related to buying and selling things a method or way of expressing sth. correction n. 改正；纠正； 修正 * objection n. 不赞成；反对；异议 accumulate vt. vi. 积累；聚积 cast vt. 扔；投；掷 to collect a large number of things over a long period of time to feel or express opposition to or dislike of sth. or someone to throw sth. conservative adj. 保守的；守旧的 often not liking or trusting change, especially sudden change vi. 反对；不赞成 object when someone expresses or feels opposition to or dislike of sth. or someone * in great detail, or complete, correct or true in every way exact adj. 精确的；准确的 carrier n. 携带者；搬运工；运输工具 altogether adv. 总共；完全地 completely or in total a person or thing that carries sth. moral adj. 道德(上)的；伦理的 relating to the standards of good or bad behaviour, fairness, honesty, etc. which each person believes in, rather than to laws straight-forward adj. 简单的；直接的；坦率的 easy to understand or simple * vt. 获得；到达（水平、年龄、状况等） used to describe two similar things that are a pair to reach or succeed in getting sth.; to achieve forbid vt. 禁止；不准 attain adj. 成对的；成双的 twin either of two children born to the same mother on the same occasion to refuse to allow sth., especially officially, or to prevent a particular plan of action by making it impossible n. 双胞胎之