Above the ball there was a special tank full of petrol which was slowly emptied(3) into the water to make the bathyscaphe heavy enough to complete its journey.

• 球的上端有一只特制的装满汽油的箱子。汽油被慢慢地注入水中，使深海潜水器能够有足够的重量下沉以完成它的海底旅行。