Analyzed press technology characteristics of vent - windows of the car side board, designed a lancing - drawing compound die.分析了车厢侧板零件通风窗冲压加工的工艺特点, 设计了一副针对该零件加工的切口拉伸复合模....
异构体被定义为化学式相同而结构不同的化合物.Isomers are defined as compounds having the same formula but different structures.由于这种编码关系, 碱基的三联体被称为密码子.Because of this coding relationship, triplet of bases is called a codon.核膜内陷,于是溶酶体被内在化.The nu...
Ireland is not for you if you want to flake out on a beach.如果想躺在沙滩上好好放松一下,爱尔兰并不是合适的地方。Oiled wood is water-resistant and won't flake.上过油的木头防水而且不会剥落。A flake of plaster from the ceiling fell into his eye, which became ...