I now call upon the chairman to address the meeting.

现在请主席向大会致辞。

They call upon all concerned parties to play their role.

这两份文书号召所有涉及母乳喂养的各方均积极发挥其作用。

I am sure the pretty bird will fly down and call upon them.

我敢肯定那只漂亮的鸟儿会飞下来向着她们歌唱。

From here, you can see there are four processors to call upon.

在此示例中，您可以看到有四个处理器可供调用。

In the day of my trouble I will call upon thee: for thou wilt answer me.

我在患难之日要求告你。因为你必应允我。