Counter-current principe
[建] 逆流原理
?? 詞語組成解析
counter
['ka?nt?]
n. 柜臺;對立面;計數器;（某些棋盤游戲的）籌碼;
adj. 相反的;
vt. 反擊，還擊;反向移動，對著干;反駁，回答;
vi. 逆向移動，對著干;反駁;
adv. 反方向地;背道而馳地;
count(to count)+er→籌碼；柜臺；計算器
普林西比島(西非島國圣多美和普林西比的組成部分)
??? 情景例句
She likes to play around.
她用情不專。
He doesn't think that beer tastes good.
他不認為啤酒的味道好。
She always referred to them as 'the shifting population', for they came and went with such frequency that I never even got a chance to learn their names.
她稱這些傭人叫“流動人口”，因為他們來匆匆，所以我甚至都沒有機會知道他們的姓名。