In bright sunshine, a model walks along the 'world's longest catwalk' at Darling Harbour in Sydney, Australia. Photo: Reuters/Daniel Munoz
The existence of nearly all life on Earth is thanks to the rays of light emitted by the sun. The sun's rays, in moderation, are beneficial to the human body, which produces vitamin D. A lack of sunlight, however, can sometimes lead to a condition known as seasonal affective disorder (SAD), a mood illness which can lead to depression. 幾乎地球上所有的生命都必須依靠太陽發射出來的光才能生存下去。適度的太陽光有益於人體製造維生素D。 然而缺少陽光有時候會引起季節性情障礙症(SAD), 這是一種情緒疾病容易導致抑鬱症。
A ray of sunshine 用於形容某事或人在艱苦或困難的情況下給他人帶來歡樂和希望，就像一縷陽光。
After failing both my exams, going to see my mum has provided a ray of sunshine.
It's been a really terrible few days, but he's been like a ray of sunshine to me.
The new client provided a ray of sunshine for Steve's business on Monday.
短語 under the sun 字面意思是在太陽底下，喻世上所有的東西。
Matthew seems to have an opinion on everything under the sun.
You can find almost everything under the sun in that shop.