closev.关；合拢；不开放；停业；结束；收盘；（使）缩小；牢牢握住或抓住；（使）靠拢；同意；短兵相接adj.亲近的；近的；几乎的；闷热的；严密的；紧凑的；剪得很短的；守口如瓶的；吝啬的；势均力敌的adv.接近；靠近；紧紧地n.死胡同；完结；结论closer to更靠近

1. Research progress on cross breeding of Chinese fir was summarized in this paper and the primary insufficiency was analyzed.
   摘要概述了我国杉木杂交育种研究进展，分析了杉木杂交育种存在的主要问题及其对策。
2. The index of drought resistance lies in yield increase and drought resistance.The hybrid breeding is the main measure for mungbean breeding.
   抗旱指数是抗旱性和丰产性的有机结合，杂交育种是提高丰产性的关键。