Hospital rule is an effective tool in the calculation of indefinite form limit.
罗必达法则是计算未定型极限的有力工具。
The verb you with concurrent sentence element may form sentences of concurrent sentence element which is indefinite in this case.
动词“有”可以带兼语构成兼语句，这种“有”字句中的兼语一般是不定指的。
If molecules can form indefinite chains by strong intermolecular hydrogen bonds, the hydrogen bonds action will be the most important factor in molecule packing.
在分子堆积过程中，分子之间如果通过强氢键作用形成无限长的链时，那么氢键将成为影响分子结晶形式的主要原因。
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