When two or more elements combine and form a compound, a chemical change takes place.当两种或两种以上的元素结合形成化合物时, 发生化学变化。Dinucleotide A compound of two nucleotides linked by their phosphate groups.二核苷酸:由磷酸基团连接的两个核苷酸组成的化合物.Magnes...
The older people were left to carry on as best they could.年纪大一点的人被留下来，奋力坚持。Rachael Carr intends to carry on teaching.雷切尔·卡尔打算继续教书。Please carry on as usual while I am away.我不在时,请照常干活....
Some of the grid sections will accumulate immediately in the trowel areas.有些板栅碎块可能立即堆积在刮刀的地方.It was his ambition to accumulate a million dollars before he turned thirty...他立志要在而立之年以前攒够 100 万美元。Households accumulate wealt...
Some manufacturers used a little fumed litharge and basic lead sulfate here also.有些制造厂也用少量细质的一氧化铅和碱式硫酸铝.Litharge itself has been used as a stabilizer.一氧化铅本身就可作稳定剂使用.Red Lead Red lead is made by calcining litharge in a mu...