New Words：

string [striŋ]
n.线；一连串
v.悬挂；系；扎；把…连在一起

strung [strʌŋ] 动词string的过去式与过去分词

Sample Sentences：

The key is hanging on a string by the door.
She wore a string of pearls around her neck.
A string of accidents happened at that corner.

These girls are stringing pearls.
Flags had been strung up across the street.

pearl [pɜːl] n. 珍珠

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