Vesuvius isn't the only active volcano threatening this densely-populated area.
维苏威火山并不是威胁这个人口稠密地区的唯一活火山。
Currently, Canada is the only active exporter of egg products to the United States.
当前，加拿大是唯一对美国出口蛋制品的国家。
But the big finding is that the cell nucleus has two compartments-and genes are only active in one.
研究者们的另一重大发现是，细胞核中存在两个间隔区域，而其中只有一个区域的基因是活跃的。
Meanwhile, the research also shows that a system with the active control combined with passive control is better than those systems with only active or passive control.
同时，研究表明：主、被动控制技术相结合的控制系统的性能比只有主动控制或者只有被动控制的控制系统要好。
In the practice of psychological counseling, there are not only active clients but also passive clients.
在心理咨询实践中，既有主动来访者，也有被动来访者。
I was working with the only active client for the group, a private technology company that engaged our bank to sell itself.
当时我负责部门唯一一位活跃的客户，这是一家私人高科技公司，正在通过我们银行对外出售。
The only active volcano on the European mainland, Vesuvius has erupted frequently since Pompeii and Herculaneum were buried by it in a. d. 79.
维苏威火山是欧洲大陆唯一的活火山，自从公元79年庞贝和赫库兰尼姆被它埋没以来，它一直频繁爆发。
Unlike naturally occurring genes which are generally only active at certain times and in certain cells, transgenes are usually active the whole time and in all cells.
自然产生的基因通常在某些时候活跃也只有在特定的细胞活跃，转基因则通常全部时间和在所有细胞中都活跃。
The only active ingredient in the spray is caffeine, which can naturally enter the human body through the skin by passing through cell membranes as it is very similar to nicotine in structure.
咖啡因是能量喷雾里唯一的活性组分，和尼古丁分子结构类似，它可以穿过表皮细胞膜直接进入人体。
Because the diaphragm is the only active inspiratory muscle during rapid eye movement (REM) sleep, there is a high theoretical risk of respiratory disorders during REM sleep in patients with ALS.
由于膈肌是快速眼动睡眠(REM)中唯一活动的吸气肌，因此从理论上讲，ALS患者REM睡眠期间发生呼吸紊乱的危险性很高。
Because the diaphragm is the only active inspiratory muscle during rapid eye movement (REM) sleep, there is a high theoretical risk of respiratory disorders during REM sleep in patients with ALS.
由于膈肌是快速眼动睡眠(REM)中唯一活动的吸气肌，因此从理论上讲，ALS患者REM睡眠期间发生呼吸紊乱的危险性很高。
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