方钻杆旋转器已经很大程度地替代了旋链，而正是旋链造成了钻台上的大部分伤害事故。
The kelly spinner has largely replaced the infamous spinning chains, which were responsible for numerous injuries on the rig floor.
DNA双螺旋链在复制和转录的过程中要在酶的催化下解旋，这是一个高度复杂的过程，目前还无法用物理学的方法来描述。
During the replication and transcription, DNA unwinds the double helix under the control of an enzyme. It is a very complex process beyond a physical description.
许多文献报道证实，庞大的侧基或具有形成氢键能力的基团有利于聚合物主链形成稳定的螺旋构象，从而赋予材料高度的旋光活性和某些特殊功能。
In general, bulky side-chain and hydrogen bonding are in favor of the formation of stable helical conformation for polymers, which endows them with high optical property and some special performance.
许多文献报道证实，庞大的侧基或具有形成氢键能力的基团有利于聚合物主链形成稳定的螺旋构象，从而赋予材料高度的旋光活性和某些特殊功能。
In general, bulky side-chain and hydrogen bonding are in favor of the formation of stable helical conformation for polymers, which endows them with high optical property and some special performance.
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