phenomenon n. 1.(pl. -na ) 【哲學】現象 (opp. noumenon); 事件。 2.(pl. phenomenons) 稀有現象;奇跡;珍奇;珍品;非凡的人。 3.【醫(yī)學】癥候。 the phenomenon of nature 自然現象。 social phenomenon 社會現象。 an infant phenomenon 神童。
Tthe quasi - biennial oscillation , an oscillating phenomenon in which the wind in the upper atmosphere over the tropics changes its direction from east to west and then back to east about every two years 準兩年振蕩發(fā)生在赤道附近的高空,分為西風異常和東風異常兩個交替出現的位相,周期約為兩年。