Around midday, the fog lifted and puffy cumulus clouds appeared across the sky.中午前后雾散了，满天出现了蓬松的积云。A polar landscape of snowy hills, dramatic cumulus clouds and coastal glaciers.雪域丘陵 、 引人注目的积云和沿海冰川的极地景观.From his bed he co...
Around midday, the fog lifted and puffy cumulus clouds appeared across the sky.中午前后雾散了，满天出现了蓬松的积云。From his bed he could see the great cumulus clouds that hung in the blue sky.躺在床上,可以望见碧蓝的天空中飘浮着大块团状的积云.A polar landscape o...
The titer of antiserum was detected by immunoelectrophoresis and double immunodiffusion.利用免疫电泳、向琼脂扩散试验分析和测定抗血清的效价.Detect the tetanus antiserum units of immunized animals by indirect hemagglutination assay.用间接血凝实验检测免疫动物血清...