A new process and high effective catalyzer of acephate's synthesis was studied in this paper.本文提供一种用新型高效催化剂催化甲胺磷与酰化剂醋酐合成乙酰甲胺磷的新工艺.Acephate is on sale principally in the form of crystal in national and international ...
The traffic lights were on amber.交通信号黄灯亮了。Would you like an amber necklace for your birthday?你过生日想要一条琥珀项链 吗 ?You should stop at an amber light.遇到黄灯你应该停下来....
It never rusts or tarnishes...它从不生锈，也不会失去光泽。It never rusts or tarnishes.它从不生锈，也不会失去光泽。This metal tarnishes easily.这种金属易变色.Brass tarnishes quickly in wet weather.天气潮湿时黄铜很快会失去光泽....
At the time many people ridiculed Isaacs, but scientists are now taking the idea seriously.当时,很多人讥笑萨克而现在科学家们正在认真地接受这一主张.In the past he has pooh-poohed suggestions that he might succeed Isaacs.过去他对自己会接替艾萨克斯之说嗤之以鼻。...the k...
The farmer milks the cows twice a day.那农夫一天挤两次母牛的奶.Sales of cleansing milks, creams, and gels have doubled over the past decade.在过去10年中，洁面乳、面霜以及发胶的销售已经增长了一倍。He milks the cow every day.他每天挤牛奶....
The most extended elective system and the most restricted elective system are alike in this respect.在这一点上,这个最大范围的选举系统和最大限制的选举系统是一回事.He used elective system, replacing the stereotype of classical courses, students can pur...