n.发射；（船）下水
动词launch的现在分词形式.
We got a fix on the missile launching site. 我们确定了导弹发射场的位置。
The rocket lifted off from its launching pad. 火箭从发射台上发射出去。
The end of the braid is wound around the hole of the launching pin and connects this pin with the fuselage. 包线的端受伤在下水的电洞周围测钎并且用机身连接这一个测钎。
