Liu Ping knows that Mr. Bell is in Beijing and asks his secretary Lin Da to make an appointment for him.

刘平知道贝尔在北京，要他的秘书林达给他约一下见面时间。

youdao

And later on if you right before or right during you give the dog some food you--you ping a bell the bell will cause the saliva to come forth.

,在喂食前或者喂食过程中,你摇铃,铃声就会加速唾液的分泌。

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