"All the nice comments vouch for his good character."
- "All the nice comments vouch for his good character."
"all the nice comments" 「たくさんの温かいコメントが」"nice" の代わりに "kind" や "good" も使えます。
"vouch for ~" 「〜を保証してました」
"his good character" 「彼の人柄の良さ」"the quality of his character" も言えます。
All of those warm comments vouched for him that he had good character.
「たくさんの温かいコメントが彼の人柄の良さを保証してました」は「All of those warm comments vouched for him that he had good character.」と言います。「vouch for」は「保証」の意味です。
たくさんの温かいコメントが彼の人柄の良さを保証してました
All of those warm comments vouched for him that he had good character.