To expound is to explain something at length — to lay an idea out, piece by piece, until the other person has the whole picture. Teachers, priests, and writers expound; friends in a café usually just explain or go on about.

To expound is to explain something at lengthexpound是指把事情講得很詳細——to lay an idea out, piece by piece把一個想法一片一片攤開來說，until the other person has the whole picture直到對方完全弄懂為止。Teachers, priests, and writers expound老師、神父和作家會expound；friends in a café usually just explain or go on about咖啡廳裡的朋友通常只是explain或go on about

It is a formal, slightly old-fashioned verb. You expound a theory, a view, a text. People also say expound on a topic, especially in American English, though the older pattern is just expound plus the thing itself, with no on.

It is a formal, slightly old-fashioned verb這是一個正式、有點老派的動詞。You expound你可以expound a theory, a view, a text一個理論、一種觀點、一篇文本。People also say expound on a topic大家也會說expound on一個主題，especially in American English尤其在美式英文裡，though the older pattern is just expound plus the thing itself, with no on不過比較舊的用法是expound後面直接加受詞，不用on

It does not mean “make bigger” — that is expand — and it is heavier than “tell.” If someone expounds, they are not in a hurry, and they want you to follow the reasoning, not just the headline.

It does not mean "make bigger"它不是「讓...變大」的意思——that is expand那是expand——and it is heavier than "tell."而且比「tell」更正式、更重。If someone expounds如果有人在expound，they are not in a hurry代表他們不趕時間，and they want you to follow the reasoning, not just the headline而且希望你跟著他的推理走，而不是只聽結論