如果你想表达成绩优秀的意思，你可以用"outstanding"来表示。这个词来源于英文"stand out"，意思是"优秀"、"突出"。例句：

She got an outstanding grade on her English test.

His performance was outstanding.

如果你想表示某人的成绩非常优秀，你可以用"excellent"来表示。这个词来源于拉丁语"excellens"，意思是"优秀"、"杰出"。例句：

She received an excellent grade on her English test.

His performance was excellent.

如果你想表示某人的成绩非常优秀，且比其他人都要好，你可以用"exceptional"来表示。这个词来源于拉丁语"exceptus"，意思是"超出常规"、"杰出"。例句：

She received an exceptional grade on her English test.

His performance was exceptional.

总的来说，如果你想表达成绩优秀的意思，你可以用"outstanding"、"excellent"或"exceptional"来表示。