Spirillum A helically shaped bacterium. 螺旋菌：一种螺旋形的细菌。
The SARS viral nucleocapsid is tubular with a helical symmetry. 沙士病毒的核壳呈管形，属螺旋对称型。
A printer that forms dot matrix characters by means of linear, ridged print hammers that impact paper and ribbon against a helical ridge on a rotating cylinder. 一种采用线性脊纹打印锤的点阵字符打印机，打印时打印锤撞击紧贴在螺旋脊纹旋转圆筒上的纸和色带。
A helical buckling of pumping rods has taken place in the course of downstroke of pumping. 认为抽油杆在下行冲程中可能因失稳而在有限空间内发生螺旋状弯曲。
A maxi- mum peak power of 660mW at 260.0nm was obtained with a helical hol- low cathode of 1.2m length, 6mm inner diameter and 9mm coil pitch. 在放电长度1.