求翻译：由一组对象组成，每个对象带有一根称为对象的生命线的竖线，用于代表时间轴，时间沿竖线向下延伸，此图描述了对象随着时间的推移相互间发生交换消息的过程。是什么意思？

Composed by a group of objects, each object with a vertical line, called objects lifeline represents the time axis, the time along the vertical line extending downward, this figure describes the object as time goes on between exchanging messages process.

Composed by a group of objects, each object with a root object is called the lifeline of the vertical line and is used to represent time-axis, and the time traveling along vertical lines extending down, this figure describes the object over time occurred between the exchange of messages.

Is composed by group of objects, each object has one to be called the object the lifeline vertical line, uses in representing the time axis, the time extends along the vertical stroke alignment under, this chart described the object to have the exchange news process mutually along with the time pass

Is composed of a set of objects, each object with a known as the lifeline of the object's vertical lines used to represent a time axis, extending along the vertical line down, this figure depicts exchange messages between objects over time.

正在翻译，请等待...