at a stretch

adv.

1. Can you work (for)six hours at a stretch?
你能连续工作六小时吗?

来自《现代英汉综合大词典》

2. He would stay for hours at a stretch in the laboratory.
他在实验室里一蹲就是好几个小时。

来自《现代汉英综合大词典》

3. Today I really swam to my heart's content. I did 3,000 metres at a stretch.
今天我一口气游了三千米,真过瘾。

来自《现代汉英综合大词典》