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åµï¼æ¯ä¸¤ä¸ªçè¯spend onåspend inï¼åªæ¯inå¯ä»¥çç¥ã
spend onåspend in çåºå«ï¼
(1) spend time ï¼money on sth. å¨â¦â¦ä¸è±è´¹æ¶é´(éé±)ãä¾ï¼
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(2) spend time ï¼ money (in) doing sth. è±è´¹æ¶é´(éé±)åæäºãä¾ï¼
They spent two years (in) building this bridge. é è¿åº§æ¡¥è±äºä»ä»¬ä¸¤å¹´æ¶é´ã
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