a flip-flop (countable)
当表示单只人字拖鞋时使用，但通常成对出现。
She bought a new flip-flop for the beach.
她为海滩买了一双新的人字拖鞋。
筋斗；翻跟头；触发器；双稳态电路；啪嗒声；脚步声；啪嗒啪嗒的响声；向后翻的筋斗
A change of places; an inversion or swap.
A bistable; an electronic switching circuit that has either two stable states (switching between them in response to a trigger) or a stable and an unstable state (switching from one to the other and back again in response to a trigger), and which is thereby capable of serving as one bit of memory.
The sound of a regular footfall.
A somersault.
I always wear flip-flops when I go to the beach.
我去海滩时总是穿人字拖鞋。
用法提示：此处flip-flops为名词复数形式，表示人字拖鞋。
She bought a pair of colorful flip-flops for the summer vacation.
她为暑假买了一双彩色人字拖鞋。
用法提示：flip-flops作为名词，指夏季穿的凉拖鞋。
His flip-flops slapped against his heels as he walked down the street.
他走在街上时，人字拖鞋啪嗒啪嗒地拍打着脚后跟。
用法提示：flip-flops是名词，描述鞋子发出的声音，体现其典型特征。
当表示单只人字拖鞋时使用，但通常成对出现。
She bought a new flip-flop for the beach.
她为海滩买了一双新的人字拖鞋。
人字拖鞋常用复数形式。
In summer, many people wear flip-flops.
夏天，许多人穿人字拖鞋。
表示观点或政策的突然转变，常用于政治语境。
The candidate made a flip-flop on tax policy.
这位候选人在税收政策上突然改变立场。
grammar · medium
易错句子I bought a new flip-flop yesterday.
正确表达I bought a new pair of flip-flops yesterday.
Flip-flop 作为可数名词，指一双人字拖鞋时通常用复数形式 flip-flops，或使用 a pair of flip-flops 表示一双。
grammar · medium
易错句子She wears flip-flop on the beach.
正确表达She wears flip-flops on the beach.
在泛指人字拖鞋时，应用复数形式 flip-flops，表示这一类鞋，而不加冠词或单数形式。
slipper泛指拖鞋，而flip-flop特指人字拖，需注意具体款式区别。
flip-flop在体操中意为后空翻，但更常见的表达是backflip。
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