他做了一顿饭，他们对此非常感激。
He cooked a meal and they were very grateful for it.
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grateful英 /ˈɡreɪtfʊl/|美 /ˈɡreɪtfəl/
解释
grateful 是形容词，由名词 grate（感激）加上后缀 -ful（充满...的）构成，意思是"充满感激的"，即"感激的、感谢的"。
He cooked a meal and they were very grateful for it.
grateful 是形容词，由名词 grate（感激）加上后缀 -ful（充满...的）构成，意思是"充满感激的"，即"感激的、感谢的"。
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