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The phrase 而已 (ér yǐ) is a common expression in Chinese that translates to "only" or "just" in English. It is used to indicate that something is not significant or is merely a minor detail. This phrase often appears at the end of a sentence to downplay the importance of the preceding statement.
For example, in the sentence "这算什么，只是一堆纸而已" (Zhè suàn shénme, zhǐ shì yī duī zhǐ ér yǐ), the speaker is saying, "What is this? It's just a pile of paper." Here, 而已 emphasizes that the pile of paper is not worth much consideration.
Another example is "我不过是出于好奇，随便问问而已" (Wǒ bùguò shì chūyú hàoqí, suíbiàn wèn wèn ér yǐ), which translates to "I was just being curious and asking casually." In this case, 而已 serves to minimize the speaker's action of asking, suggesting that it was not a serious inquiry.
In summary, 而已 is used to express that something is trivial or not worthy of much attention, often serving to soften the tone of a statement.