我们将在六点一刻离开。

We're leaving at (a) quarter past six.

六点一刻开始上课，七点一刻结束。

The classes start at a quarter past six and end at a quarter past seven.

他要求六点一刻叫醒他。

He asks to be called at 6. 15.

他要求六点一刻叫醒他。

He asks to be called at 6.15.

他要求在六点一刻电话叫早。

He asks for a call at 6.15 .

我通常在大约六点一刻时起床。

I usually get up at around six fifteen.

我们离开贝克街的时候是六点一刻。我们提前十分钟到达塞彭泰恩大街。

It was a quarter past six when we left Baker Street, and it still wanted ten minutes to the hour when we found ourselves in Serpentine Avenue.