Piggy knelt by him, one hand on the great shell, listening and interpreting to the assembly . 猪崽子跪在他身边，一手按着大海螺，听他讲，并向其余的人作出解释。
The expected adduct 100 was not stable and appeared to undergo further reaction to the spiro intermediate 101 . 由于所期待的加成物（100）不稳定，它经过进一步的反应，就产生螺环中间体。
Two general categories of dislocations are spiral and line(edge), the terms being aptly descriptive of their shape . 位错一般分为两种形式，螺形和线形（刃型）位错。其术语恰当地表征了它们的形状。
Angle joints with screw studs , with rivet studs 用螺桩铆钉螺桩连接的角形连接件
Stud , screw and pipe extractors : safety requirements 螺柱螺钉和拔管器:安全要求
Method and efficacy of killing oncomelania in the army 部队开展灭螺的方法和效果
Bolted connections with reduced shank ; stud - bolts 带缩径杆的螺栓连接件.双头螺柱
Materials are fed forcibly by double screws 双螺杆强制喂料，喂料均匀、范围广。
Dynamic simulation of screw chillers during start - up 螺杆冷水机组启动过程的仿真
Earth - moving machinery . drain , fill and level plugs 土方机械排液加液和液位螺塞
