1 Translate the following sentences into Chinese ( 注意被动语态): 1. While space travel still gets a lot of attention, not enough attention has been accorded to a major new expedition to the deepest point in the ocean, ... ______________________________________________ 2. The main costs of space exploration arise from the fact that we are set on sending humans, rather than robots. ___________________________________________________ 3. Space vehicles for humans must be made safe, while we can risk a bunch of robots without losing sleep. ___________________________________________________ 4. Ocean organisms are said to hold the promise of cures for an array of diseases. __________________________________________________________________