...the internationally agreed rules of chemical nomenclature.国际公认的化学命名规则It developed variations in nomenclature and in substance.它在名称上和实质上都发生了一些变化.Multiply unsaturated compounds are usually best named by the IUPAC nomenc...
My own house feels as filthy and chaotic as a bus terminal.我自家的房子感觉又脏又乱，活像公共汽车终点站。Things have been getting chaotic in the office recently.最近办公室的情况越来越乱了.Things often appear chaotic to the outsider.在外人看来事情常常好像一片混乱....
He tacked the sheets of paper on as carefully as possible.他尽量小心地把纸张钉上去.After negotiation, they tacked two new clauses on to the end of the contract.通过协商, 他们在合同末尾处又加上了两项新条款.He had tacked this note to her door...他用图钉将这张便条钉...