From this point forward, all manipulation of the message is done through the message object.
从此之后，消息的所有操作都通过Message对象来完成。
In this paper, the calculating formulas are put forward from the definition of cardinal point.
从基点的定义给出厚透镜基点的计算公式。
In this paper, the calculating formulas are put forward from the definition of cardinal point.
从基点的定义给出厚透镜基点的计算公式。
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