God's joke

Do you know what the cruel joke that God has played on all men is? He gave them a brain and a dick, but only enough blood to run one at a time.

Notes:

1. Do you know what the cruel joke that God has played on all men is?

你知道上帝对所有的男人开了什么残酷的玩笑吗?

“play a joke on sb.”表示“对某人恶作剧、开玩笑”。God (g大写)是指上帝，而god(g小写)是泛指一般的神?

2. He gave them a brain and a dick, but only enough blood to ran one at a time.

他给了他们一颗脑袋和一个生殖器，但是所给的血液只够他们每次运转其中的一个。

“time”在这里表示“次数”，"at a time"是指“一次;同 时”，请小心不要和“at one time”(曾经;从前.)弄混了。