square meal きちんとした食事

square meal はきちんとした食事。2:36 these people are having no choice but to come north. they don't get three square meals a day. 貧困メキシコ人たちは北を目指す以外に選択肢はない。彼らは一日三食のまともな食事にもありつけないでいる。

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https://www.youtube.com/watch?v=bQpGR70fsvU  1:09 once upon a time USDA square meal recommendations were square. かつてはアメリカ合衆国農務省の推薦する正しい食事の内訳は四角いマスに収まっていた。
Mo Rocca serves up MyPlate

練習問題解答
a-6565 three squares (a day)
b-5401 three square meals a day