Methods The diagnoses and differential diagnoses of twelves cases of SHL were analyzed.

方法对1 2例SHL患者的诊断及鉴别诊断进行分析。

We were on a plane and had about two hours to kill. I figured running through the twos to the twelves would take about 20 minutes.

当时我们正在飞机上，大约有两个小时的空闲时间。我本来估计过一遍乘法表可能需要20分钟。