Flow circuit
[經] 輸津管網
?? 詞語組成解析
flow
[fl?u]
vi. 流;垂;流出;（談話、文體等）流暢;
n. 流動;滔滔不絕;漲潮;連貫;
vt. 使泛濫;淹沒;排出;
??? 情景例句
Where'd you spend your vacation?
你在哪兒度的假？
How are you?
你好嗎？
and we have only to turn to that extraordinary discovery of echo-location in bats to see a case in which the voice plays a strictly utilitarian role.
我們只要看一看蝙蝠回聲定位這一極不尋常的發現，就可以探究一下聲音在什么情況下有絕對的實用價值。