Only a mounded upper curve remained like half a bell mouth, the curve of a tunnel rearing above the dunes.

只剩下一个像半个喇叭口一样的丘状上部曲线，隧道的曲线在沙丘上方竖起。

She leaned back and put her head against the upper curve of the padding on the back of the booth.

她向后靠了靠， 把头靠在展位背面衬垫的上部曲线上。