背孔陆栖寡毛类身体背面体节分界处的小孔。通体腔,管中无纤毛。能分泌黄色或白色的体腔液。据称澳大利亚产的一种巨蚓类(Megascolides austra-lis),在给予刺激时,体腔液的喷出可达数英寸高。
身体前几个节间沟内经常无背孔。
There are usually no dorsal pores in the first few intersegmental grooves.
这是一个炎热的午后,在行进途中,向导布达赫斯瓦·孔瓦突然让我们把吉普车停下来,因为他看到一只印度棱背龟(Indian tent turtle)趴在路上。
Budheswar Konwar, my guide, stopped our open-topped jeep so he could move another aquatic creature-an Indian tent turtle-off a back road on a hot afternoon.
通过求解压缩机热力学模型和进行动力计算,分析了背压孔的一般运动规律。
General motion low of back-pressure ports position is developed by solving thermodynamic model of compressor and carrying out dynamical computation.
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