Helicopters fly in appalling weather to succour shipwrecked mariners.直升机在恶劣的天气条件下起飞前去援救遇难的船员。Mariners were also able to fix their latitude by using an instrument called astrolabe.海员们还可使用星盘这种仪器确定纬度。The ancient mariners tr...
The interaction of the two groups produced many good ideas.两个组的相互交流产生了许多好主意.The dynamic interaction of these three groups makes the economy function.这三部分人之间有力地相互作用,从而推动着经济的运转.Price is determined through the interaction o...