semilunar fold

例句：

1. 1. The moon's light illuminated the dark night sky with a beautiful semilunar fold.
   月亮的光芒在黑暗的夜空中勾勒出美丽的半月形褶皱。
2. 2. The scientist observed the formation of a semilunar fold in the ocean surface.
   科学家观察到海洋表面的半圆形褶皱的形成。
3. 3. The car's suspension system was designed to minimize the occurrence of semilunar folds during high-speed driving.
   汽车悬挂系统的设计旨在减少高速行驶时出现的半圆形褶皱。