Brainlessly tells you how someone did a thing: they did it in a completely stupid way, without thinking. “He brainlessly agreed” means he said yes without using his head.

Brainlessly告訴你 tells you how someone did a thing某人是怎麼做一件事的：they did it他們做這件事 in a completely stupid way用完全愚蠢的方式， without thinking沒有經過思考。「He brainlessly agreed他沒經大腦就答應了」 means是指 he said yes他說了好， without using his head沒用腦子想。

The adjective brainless describes a person, an idea, or a rule; this -ly form describes the action. Informal, and still quite sharp — the same blunt feel as brainless.

The adjective形容詞 brainless描述 describes a person, an idea, or a rule一個人、一個想法、或一條規則；this -ly form這個-ly形式 describes the action描述的是那個動作。Informal非正式，and still quite sharp而且語氣還挺尖銳 — the same blunt feel as brainless跟brainless一樣直白不客氣。

It does not mean the person has a medical problem, and it is not a forever label; it is about one empty-headed move.

It does not mean它不是指 the person has a medical problem這個人有醫學上的問題，and it is not也不是 a forever label一個永久的標籤；it is about它指的是 one empty-headed move某一次沒過腦的舉動。

Though actually, students sometimes mix the two forms and write brainless where English wants the adverb: we say she answered brainlessly, not she answered brainless.

Though actually不過其實，students學生 sometimes mix the two forms有時會把這兩個形式搞混 and write brainless寫成brainless where English wants the adverb在英文該用副詞的地方：we say我們會說 she answered brainlessly她沒經大腦地回答，not she answered brainless而不是she answered brainless。