current differential relay

例句：

1. 1. The current president isa man named Barack Obama.
   现任总统是名叫巴拉克·奥巴马的人。
2. 2. The currenttemperature is 25 degrees Celsius.
   当前温度是25摄氏度。
3. 3. Thecurrent trend in fashion is towards minimalism.
   当前时尚趋势是简约主义。