launchingn.发射；（船）下水动词launch的现在分词形式.launchv.发起；推出（新产品）；发射；使(船)下水n.发射；产品推介launching boost发射助推器Launch strategy投放策略launching dolly浮筒launching party展销会; 首发式Launch Canister发射筒launch altitude发射高度launching apron发射坪launching curve发射曲线launch security发射安全性launching berth下水滑道