光是的英文：
solely
just

Dawn is the herald of day.
曙光是白昼的先驱。

Silver Blaze was the favourite to win.
（赛马）银光是最有希望的获胜者。

I was too much exhausted to reflect upon this circumstance, but ate and drank with avidity
我实在累得很，没去琢磨是怎么回事，光是狼吞虎咽地吃喝一顿。

The very thought is frightening.
光是想就令人害怕

It is nice to have some sunshine for a change.
改成有点阳光是好的。

Light is a stimulus to growth in plants.
光是植物生长的促进因素。

The aurora is one of nature's most awesome spectacles.
极光是自然界最可畏的奇观之一。

Dipping the car lights repeatedly is a signal for car-meeting.
反复变换远近光是会车的信号。

The aurora is one of nature's most awesome spectacles.
极光是自然界最可畏的奇观之一。

A star does not shine because some occult force has caused it to do so.
一颗恒星不发光是因为某些未知的力所致。

sole discretion
自行决定权

There was a hole in the sole of his shoe.
他鞋底上有一个洞。

Practice is the sole criterion of truth.
实践是检验真理的唯一标准。

Their sole aim is to destabilize the government.
他们唯一的目的就是要动摇政府的统治。

The soles are made of leather.
鞋底是皮革做的。