那时 [na4 shi2]
at that time
参考例句
士兵们(那时)正在挖战壕.
The soldiers were digging trenches.
他那时50岁头发就渐白了.
He was 50 and greying.
刘易斯那时仍在襁褓中(即刘易斯那时仍是个婴儿)
Lewis was in long clothes then.
我无法向你描述那时我的感受.
I can't describe to you what I felt at that moment.
罗马帝国在那时已经衰亡.
At that time,the Roman Empire had already decayed.
那时我在一辆拥挤的公共汽车上.
I was on a packed bus.
他们那时赚的钱养活不了自己.
They couldn't earn enough money to maintain themselves.
在那时是一桩很棘手的事.
It was then a hard nut to crack.