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.
现有技术中传声器的背侧孔典型地要求在制造过程中于硅片的后表面上进行一种二次机加工操作。
The backside holes of prior art microphones typically require that a secondary machining operation be performed on the rear surface of the silicon wafer during fabrication.
应用推荐