这些明信片太棒了，可以用英语表达为 "These postcards are great!"。
来源：Great是形容词，意思是"伟大的，杰出的"。
例句：
"I think these postcards are great, the pictures are so beautiful." (这些明信片太棒了，图片非常漂亮。)
"I got some great postcards from my vacation, I can't wait to send them to my friends." (我从度假中得到了一些很棒的明信片，我迫不及待地要给我的朋友们寄出去。)