How very thoughtless. I'll give him a piece of my mind.

太欠考虑了。我要狠狠地批评他。

《柯林斯英汉双解大词典》

The struggle merely to overcome habits, without uncovering their deeper significance, makes the mind-heart thoughtless, superficial, insensitive.

斗争只是去克服习惯，而不是去揭露它们深层的意义，让理智和心灵粗心大意，肤浅，麻木不仁。

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