Full of, or causing, gladness.

充满快乐的；令人喜悦的。

That which is joyful inspires an emotion of extreme delight, and usually brings an outward expression.

Joyful 指能引发极愉快的情绪，并常令人喜形于色：

That which is joyous springs from an in ate quality.

Joyous 指发诸于内的； joyous laughter 欢笑。

Jolly and jovial suggest good-natured mirth.

Jolly 及 jovial 均指和乐的欢愉：