易混淆字詞 - valuable & invaluable & priceless

valuable值錢的，貴重的，有價值的
He bought me a valuable diamond ring as a birthday
present.
他給我買了一只貴重的鑽戒作生日禮物。
This experience is valuable to me. (valuable=useful)
這一經歷對我很有用。
invaluable：extremely useful 非常貴重的，無價的
His advice has been invaluable to the success of the
project.
他的建議對這一工程的成功起了無法估量的作用。
priceless：貴重的，無價的
1. extremely valuable
2. a quality or skill that is priceless is extremely important or useful

We saw priceless paintings at the museum.
我們在博物館看到貴重的名畫。