interplanetary medium[天] 行星际物质
interplanetary dust[天] 行星际尘埃;星际尘;行星际尘;行星尘埃
Interplanetary Trade星际贸易
interplanetary particle行星际粒子;宇宙粒子
space interplanetary行星际空间
Interplanetary Structure行星际结构
Interplanetary source行星际源
Interplanetary Prophets表演者
ADJ（形容词） Interplanetary space travel is travel between different planets. 行星间的 [ADJ n]
...an unmanned rocket scheduled to head toward the sun, to a point in interplanetary space a million miles away.
...一枚无人火箭计划飞向太阳，到达一百万英里外的行星空间。