中文谷interstellar cloud造句怎么写
- 造句
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A nebula an interstellar cloud of dust, hydrogen gas, helium gas and plasma.
The interstellar cloud of gas and dust is an active star-forming region.
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A nebula an interstellar cloud of dust, hydrogen gas, helium gas and plasma.
The interstellar cloud of gas and dust is an active star-forming region.
