来自helix,螺旋形。

1. The polynucleotide chain is helical.

多核苷酸键是螺旋形的.

2. In a globular protein, certain portions of the chain are coiled into helical segments.

在球状蛋白中, 链的某些部分被盘成螺旋状.

3. Two types of viral symmetry have been recognized, the cubical symmetry and helical symmetry.

已经证实病毒有两种对称型, 即立体对称和螺旋对称.

4. In reality, helical springs symmetric pitch near both ends.

实际上弹簧两端螺旋角逐渐变小.

5. The structure of the light is a helical line.

提出光的螺旋线模型.