potential dangers 可能的危险  potential customers 潜在的客户 
a potential Prime Minister 未来的首相 
have the potential to do sth／for（doing）sth. 有做某事的潜力 
realize／achieve one＇s potential 发挥某人的潜力 
Blood circulates through／in the body．血液在身体里循环。
circulate false news 散布虚假消息 
be in circulation 在流通（循环；传播）
have a daily circulation of 55,000 日发行量是55,000份 
try out new teaching methods 试用新的教学方法 
try out sth. on sb. = try sth. out on sb.     在某人身上试验某物 
try out for 参加...的选拔（试试能否选上）  try for   设法争取得到
try on 试穿               try sb. 审问某人__ 
His courage was tried. 他的勇气被考验了。have atry／go 试一一试 
背单词的好方法
随时随地背单词
不知不觉背单词
在时间或条件状语中，表示将来的动作;When you see her just tell her that I am all right .
在某些文学作品的情节描写中，代替过去时，表示或用于引述书刊材料;The author says that the soldiers fight for freedom not for money。

application n ①应用／运用 the application of science to industry在工业上对科学的应用 
申请／申请表 an application___admission to school 入学申请 
敷／涂抹药  the application of this medicine to the wound 
apply to 适用于               apply to sb.for sth. 向某人申请某物 
apply oneself to 致力于，专心于 
apply ... to (doing) ...  把...运用于；把...涂（敷）在...上 
give approval to···批准·······
approve        approve of sb./sth. 赞成／同意 
vt.批准，通过
disapproving adj.不赞成的    disapprovingly adv. 
disapprove v.

Without his wartime experiences, Hemingway ________ his famous novel A Farewell to Arms.
A. didn't write
B. hadn't written
C. wouldn't write
D. wouldn't have written
 Without computers, the world_______what it is today.
A.would be
B.would not be
C.won’t be
D.hadn’t be

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