幫我分析一下這個(gè)英語(yǔ)句子的結(jié)構(gòu)~
The marine environ-ment,representing more than two thirds of our planet,is still under-explored and
is considered to be a prolific resource for the isolation of less exploited microor-ganisms and to produce new antifungal substances.
這個(gè)句子中的representing more than two thirds of our planet是什么成分?整個(gè)句子是什么從句?樓主大學(xué)畢業(yè)7年多了,語(yǔ)法都忘了,今天看英文文獻(xiàn),意思能懂,語(yǔ)法完全不行,過(guò)一陣要寫(xiě)英文文獻(xiàn),全都重檢起來(lái)真痛苦!