重力
zhongˋ liˋ
Gravity
無重力狀態
Null-gravity, Zero gravity, No gravity, Without gravity
wuˊ zhongˋ liˋ zhuangˋ taiˋ
火星重力下的
In Martian gravity
huoˇ xing¯ zhongˋ liˋ xiaˋ de˙
重力助推
Gravity assisted push
zhongˋ liˋ zhuˋ tui¯
進行重力助推後
After performing gravity assisted push
jinˋ xingˊ zhongˋ liˋ zhuˋ tui¯ houˋ
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