Mentally keen; clever; quick of perception. 智能敏慧的;聪明的;敏锐的。 (of a disease) coming quickly to a dangerous condition. 【医】急性的。 Of sounds, high in pitch; shrill. 高音的;(声音)尖锐的。 (Angle) measuring less than 90 degrees. 【数】(几何)小于90度的;锐角的。 (Triangle) containing only acute angles. 锐角三角形的。 adv. acutely. n. acuteness. shrewd, intelligent, penetrating, piercing, keen. |