unwrapp

children excitedly unwrapping and playing with their new presents.

兴奋地打开包装玩起了新物的孩子们。

The children unwrapped their Christmas presents with delight.

孩子们高兴地把物拆开。

And trigonometrical function table checking method is referenced to reduce large arithmetic amount in the unwrapping process.

并用三角函法减少了展开过程的运算量。