He is drinking lemon squash.

他正在喝柠檬露。

For instance, black current, grapes, lemon, squash, almonds, ostrich, cold water fish etc. are very good source for good eyesight.

如，黑加仑、葡萄、柠檬、南瓜、杏仁、鸵鸟、深海鱼等，都是非常有益视力的食物源。