英语释义
1
n a column of light (as from a beacon)
2
n a branch of an umbel or an umbelliform inflorescence
3
n (mathematics) a straight line extending from a point
4
n a group of nearly parallel lines of electromagnetic radiation
5
n the syllable naming the second (supertonic) note of any major scale in solmization
6
n any of the stiff bony spines in the fin of a fish
7
n cartilaginous fishes having horizontally flattened bodies and enlarged winglike pectoral fins with gills on the underside; most swim by moving the pectoral fins
9
v extend or spread outward from a center or focus or inward towards a center