单词	gravity assist
释义	gravity assist 重力助推
随便看	sand disk sand distribution Sand-Dollar sand dollar sand dollars sand dome sand down sand drain sand drain method sand-drain process sand drain vacuum method sand dredge sand dredger sand drier sanddrift sand drift Sand-drift sand-drift control sand drift observation sand drip sand-driving wind sand drop sand dropseed sand dropseeds sand dry 皮球擦油，又圆又滑皮球泄了气皮破骨头烂皮笊篱，一捞个罄尽皮笊篱，一滴水不漏皮笊篱，不漏汤皮笊篱，捞个罄尽皮笊篱，滴水不漏皮笑肉不笑皮绳套不住流水，空想得不到幸福人相人祸人种人称人穷呼天人穷志短人类人精人缘儿人缝