Arc sine
逆正弦
?? 詞語組成解析
arc
[ɑ:k]
n. 綜合癥狀;弧（度）;天穹;電弧，弧光。;
vi. 形成拱狀物;循弧線行進;
abbr. American Red Cross. 美國紅十字會;
sine
[sain, 'saini, 'sinei]
prep. 無;
n. 正弦;
??? 情景例句
Tell me about your educational background.
告訴我你的學習背景。
Right on, Packers!
加油，博卡茲！
Oh, Pierre, how wonderful! But I don't think we can go. I haven't got an evening dress for the ball! And a new dress costs over four hundred francs.
啊，比爾，太棒了！不過，我想我們去不成。我沒有參加舞會的晚禮服啊！而一件新的晚禮服得花400多法郎。