In case of difficulty, just call on me.

如有困难，找我好了。

《新英汉大辞典》

You just call on me, brother, when you need a hand.

你只要叫我一声，兄弟，当你需要帮助。

youdao

I call it the Low-Blow approach, because I just realised the guy who sold me my car used it on me.

我之所以叫它虚报低价法是因为我才意识到卖给我车的那个小伙子就是用的这种方法。

youdao

So prices are determined as follows: prices depend on some parameters I'm just going to call a and b, and let me write the equation and then we'll see what it looks like.

价格由如下因素决定,价格取决于两个参数a和b,我们用方程写一下吧

耶鲁公开课 - 博弈论课程节选