黄铜是铜锌合金。Brass is an alloy of copper and zinc.铜锌合金叫做替代式合金.Copper - zinc alloys are called substitutional alloys.材料: 采用高强度结构或锌合金压铸或不锈钢制成.Material: Strengthened structure or zinc alloy die - casting or stainless steel....
"You were just looking," contends Samantha. "I was the one doing all the work."“你不过是看看而已。”萨曼莎争辩道，“什么活儿都是我来干。”He contends for his own individual soul against the universal reality.他争取自己的个人灵魂而抗击宇宙的真实.Each side contends tha...
That's where the shoe pinches.那就是困难所在.The shoe pinches me.这鞋太挤脚.The coach said he wasn't worried about any position except quarterback; that was where the shoe pinches.教练员说除前场与中场的位置以外,他不担心其他别的位置; 前场与中场的位置是困难所在....
The accuracy rate in PHCcombining positivity of AFU and AFP was 93.9 %.AFU与AFP联合检测,可使PHC的诊断阳性率提高到93.9%.Results Various proteins, including alpha fetoprotein ( AFP ), alpha antitrypsin ( AAT ) and alpha antichymotrypsin (...