sharpness和flexibility的區別：意思不同、讀音不同。
sharpness
英 [?ɑ?pn?s] 美 [?ɑrpn?s]?
n.銳度；尖銳；銳利；高音。
flexibility
英 [?fleks?'b?l?ti] 美 [?fleks?'b?l?ti]?
n.靈活性；柔韌性；彈性；適應性。
There was a sudden sharpness in her voice.
她的嗓音突然擡高了。
Study on Adaptive Resonance Theory Based Wheel Sharpness in Grinding Process.
基於自適應***振理論的磨削過程砂輪鋒利度識別研究。
There has got to be a degree of flexibility.
得有壹點靈活性才行。
"Flexibility and control is key," she continued.
她繼續補充道，“靈活性和掌控性是關鍵。”