The idea is to experiment if potatoes and silk worms can flourish on the Moon in simulated minibiosphere. 老师好,请问on the Moon 是地点状语还是potatoes and silk worms 的定语?
They had just had enough time to swim out of danger when the boat again completed a circle. 这句话为什么是again completed,不应该是completed a circle again吗?again修饰动词不是放后面吗?