伽利略说其实雪橇并没有继续前进，物质的自然力以相同速度，朝着相同方向运行，除非受到了某个力的影响。
What Galileo had said was no actually the sledge keep going because the natural motion of things is to keep going in the same direction they are going at the same speed unless acted upon by a force.
尽管这是朝正确方向前进的一步，但是要告诉从事应用程序开发的用户和程序员究竟发生了什么问题，这些消息仍然是没有太大用处的。
While this is a step in the right direction, it's still a pretty useless message in terms of telling the user or a programmer working on the application what actually went wrong.
这些海洋滑翔器没有引擎，取而代之的是通过改变浮力在垂直方向上进行操控，水平方向上依靠一对又短又硬的翅膀滑翔前进。
These sea gliders do not have an engine and instead manoeuvre vertically by changing their buoyancy while relying on a pair of short, stubby wings to glide forwards.
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