The nature of the nutritional requirements for obligate parasites in nature is unknown.
The nature of the nutritional requirements for obligate parasites in nature is unknown.
人们还不知道自然界中专性寄生菌的营养要求的本质。
The nature of the nutritional requirements for obligate parasites in nature is unknown.
人们还不知道自然界中专性寄生菌的营养要求的本质。