Double arc method
[化] 雙電弧法
?? 詞語組成解析
double
['d?bl]
adj. 雙的;兩倍的;兩面派的;雙人用的;
vt. 使加倍;把…對折;重復;
vi. 加倍，加倍努力;快步走;
adv. 兩倍地;雙重地;
n. 兩倍;雙精度型;
doub二，雙+le反復 → 反復兩倍 → 翻倍
arc
[ɑ:k]
n. 綜合癥狀;?。ǘ龋?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;
??? 情景例句
Hey, what did you do on your trip?
嗨，旅游時玩的怎么樣？
Are you used to the food here?
你習慣吃這兒的飯菜嗎？
and should not be put in drinks unless it is known to be safe.
只有知道冰塊安全時才能加入飲料。