有时这些碳棒包上一层铜,以增加其导电性.Sometimes the carbon rods are copper coated to improve electrical conductivity.当定购这种硅碳棒时,提供额定电阻是非常重要的.It is important to provide the nominal resistance when ordering.这种硅碳棒的连桥结构正是在此基础上去除了任何焊接部分.The Ele...
Her voice was shockingly loud. "Put the chair down," she brayed.她的声音大得吓人。“放下椅子，”她粗声说道。Shockingly, this useless and dangerous surgery did not end until the 1930s.令人震惊的是，这种既无效又危险的手术直到20世纪30年代才被废止。His memory was becoming sh...
A hydrocarbon was known to be either an alkene or alkane.某碳氢化合物已知可能是烯烃或是烷烃.The hydrocarbon must be an alkene.这个碳氢化合物必定是烯烃.The betaine will collapse to the alkene only when these two functions are eclipsed.只有当这两个基团移至重迭位置时...