“正是时候”用英文怎么说，越简短越好

可以用it is a right time to do some thing；
也可以用high time；
或者直接用now；
还有right now。
it is a right time to visit Mary.
it is a high time to visit Mary.
we will go to visit Mary now.
we will go to visit Mary right now.
现在访问马丽正是时候。

high time

It is time

at that monment

just at the time

Just in time!