For instance, a certain kind of tadpole can tell the depth of the water it is swimming in by the pitch of a tone which is produced by its own lungs.

举个例子，有一种蝌蚪能感知它所游泳之处水的深度，它是通过某种自己肺部产生的声音的音调来判定的。

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Notate certain lines that need to be said with a specific tone, emotion or volume. For example, mark a line if it needs to be said in anger or a whisper.

指出那些需要特殊的语气，感情或者音量的台词。比如标出一段台词是该用愤怒的语气说出来还是悄悄的说出来。

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Visualize the play in your head. Take note of any lines that are critical to the plot and must be delivered in a certain way to match the tone of the scene.

在脑子里将整出戏形象化，并标记出对情节起关键作用，必须用特定方式表达才能与剧情相符的对话。

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