trefoil

trefoil windows.

三叶形窗户。

a trefoil of parachutes lowers the shuttle's used rockets to Earth.

三个降落伞将运载航天飞机升的火箭降落到地面。

Methods After designs the trefoil flap in the prolabium, the displaced tissuce is replaced and the columnella is lengthened, the sill is raised by the application of the trefoil flap.

法前唇设计出三叶瓣后,先对移位的组织进行完全游离及复位,再将三叶瓣鼻小掀起,延长鼻小及抬高鼻底。

"The Bar tracery of the parallel English Decorated style formed netlike patterns Based on the circle, arch, trefoil, and quatrefoil."

平行的英国装饰风格的棂条窗花格以圆圈、拱形、三叶形和四叶形为基础,形成网状图案。