单语范例（未经PONS编辑处理）
英语
- However, double helical gears are more difficult to manufacture due to their more complicated shape.en.wikipedia.org
- Bulges and internal loops are formed by separation of the double helical tract on either one strand (bulge) or on both strands (internal loops) by unpaired nucleotides.en.wikipedia.org
- For double helical, it does not include the gap.en.wikipedia.org
- Water enters tightly bound amorphous regions of double helical structures to swell amylopectin, thus causing crystalline structures to melt and break free.en.wikipedia.org
- During gelatinization of starch, three main processes happen to the starch granule: granule swelling, crystal or double helical melting, and amylose leaching.en.wikipedia.org
- The double helical or herringbone gear balances the thrust caused by normal helical gears.en.wikipedia.org
- A double helical gear can be thought of as two mirrored helical gears joined together.en.wikipedia.org
- The exterior envelope of the stays is itself coated along its entire length with a double helical weatherstrip.en.wikipedia.org
- The ships' powerplant incorporated several recent developments in turbine equipment, including double helical reduction gears and high-pressure steam technology.en.wikipedia.org
- In one example, they incorporated platinum to create a double helical metallopolymer.en.wikipedia.org
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