The plus sign is used in addition and the minus is used in subtraction.加号用于加法;减号用于减法....using concrete objects to teach addition and subtraction.用实物来教加减法There will be simple tests in addition, subtraction, multiplication...
Entomologists have tended to underestimate the importance of colonization through dispersal.昆虫学家倾向于低估在扩散过程中定居现象的重要性.Forest entomologists have concentrated on ecological problems.森林昆虫学家所重视的是生态问题.Entomologists claim that o...
这家剧团上演了一出讲述无家可归者的戏。The company put on a play about the homeless.她现年87岁，曾经是齐格菲尔时事讽刺剧团的成员之一。She's 87 years old, and a one-time member of the Ziegfeld Follies.对赞助的依赖会给剧团带来不良的影响。Reliance on sponsorship can have a malign...