cirrus

1.In addition,a new structure,frontal cirrus between the frontal cilia and laterofrontal cirri,is found only on the gill surface of Corbicula fluminea.

此外，仅在河蚬鳃表前纤和前侧纤之间，观察到一纤结构——前触。

2.Analogous to a sundog or parhelion, the paraselene is produced by moonlight shining through thin, hexagonal-shaped ice crystals in high cirrus clouds.

类似环日形成一样，在高空卷云中，月光通过稀薄、具有六边形状冰晶时产生了幻月。