Calcium carbonate occurs in the allomorphs calcite and aragonite.同质异晶的方解石和文石中含有碳酸钙.And some calcite - secreting organisms also add magnesium to the mix.有些分泌方解石的生物,会在分泌物中加入镁.The chemical composition of the melo shell is c...
The prospectors have discovered such minerals as calcite, quartz and asbestos here.探矿人员在这里发现了方解石 、 石英、石棉等矿藏.At first glance, calcite might be confused with quartz where both are clear, colorless, and " glassy ".乍一看来, 方解石...
Under certain circumstances, including material processing more cost - effective, time - saving effort.一定情况下, 包料加工更经济实惠 、 省时省力.Easy to operate time - saving , labor - saving, high efficiency, low failure.操作简单、省时省工 、 效率高 ...
They jogged in silence a while, faces lowered, out of step.他们低着头，一言不发地慢跑了一会儿，步伐也不一致。He's out of step with the rest of us.他和我们大家步伐不大谐调.Tom is out of step with the times.汤姆跟不上时代的步伐....
She built up her fortune by cannily playing the stock market.她炒股有方，发了大财。Jane is determined to hold on to her fortune.简决心要守住自己的财产。When fortune smiled on him, he made the most of it.当好运来临时，他充分把握住了。...
Early determination of patient - ventilator asynchrony, air - leaks and variation in respiratory parameters is important during mechanical ventilation.在机械通气过程中,非同步呼吸患者的早期决断、呼吸参数的漏气和变异是(非常)重要的....