开幕日的英文：
opening day
n. 开，启，（职位的）空缺，（正式的）开始；开端；首场演出
adj. 开放的；开始的；首场演出的
They are open to temptations.
他们容易受诱惑。
The flowers are opening.
花正在开放。
an open package
未封上的包裹
It is easy to open a shop But hard to keep it always open
创业容易守业难
'Will you let me open it?' — 'Pardon?' — 'Can I open it?'
“我能打开它吗？”——“请再说一遍？”——“我能打开它吗？”
n. 一天；白昼，白天；工作日；时代，时期
Things go on day by day.
事情逐日进行着。
Day by day the situation is improving.
情况在一天天地好转。
Like this, day after day.
就这样，日复一日。
It was a fateful day.
那是个不祥的日子。
Meantime, from day to day they endure.
同时，一天天他们捱了下去。