Experiments have also cast serious doubt on the belief that yawning is triggered by a drop in blood oxygen or a rise in blood carbon dioxide.
对于打哈欠是由血液中的氧气减少或血液中的二氧化碳增加引起的这种观点，一些实验也同样提出了严重的质疑。
Armor C12 convertible notebook has a die-cast magnesium alloy case, and has been tested for drop-shock, moisture, temperature extremes, and resistance to dust and vibration.
ArmorC12 convertible笔记本电脑具有印模压铸的镁合金外壳，已经通过了跌落冲击、潮湿、极端温度与防尘和抗振动测试。
Drag and drop spell icon to cast a spell.
拖放法术图标施放一个法术。
CAST was informed yesterday from Wuhan, Wuhan, an invention of water-saving valve high school students, can not drop water heater outlet pipe in cold water.
昨日从武汉市科协获悉，武汉一高中生发明的节水阀，可使热水器出水管中不出一滴凉水。
CAST was informed yesterday from Wuhan, Wuhan, an invention of water-saving valve high school students, can not drop water heater outlet pipe in cold water.
昨日从武汉市科协获悉，武汉一高中生发明的节水阀，可使热水器出水管中不出一滴凉水。
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