ããa piece/length of stringç´è¯ä¸ºâä¸æ¡/æ ¹ç»³åâã
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ãã1ãA piece of string has twisted round the propeller.
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ãã2ãhe hooligan strangled her with a piece of string.
é£æµæ°ç¨ä¸æ ¹ç»³åæ她åæ»äºã
ãã3ãShe tied a knot in a piece of string .
ãã她å¨ä¸æ ¹ç»çº¿ä¸æäºä¸ä¸ªç»ã
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