采用野外调查和资料研究方法，对河南安息香属植物进行了研究。
Styrax in Henan Province were studied by field investigation and data analysis.
本研究通过野外调查，了解了中国秤锤树属与长果安息香属植物的地理分布、濒危现状及其迁地保护状况。
We conducted an extensive field survey of current geographic distribution of their natural range, and in situ and ex situ conservation status of the remnant populations of the two genera.
本研究通过野外调查，了解了中国秤锤树属与长果安息香属植物的地理分布、濒危现状及其迁地保护状况。
We conducted an extensive field survey of current geographic distribution of their natural range, and in situ and ex situ conservation status of the remnant populations of the two genera.
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