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汉语拼音：fā suān

1.食物变酸：碱放少了，馒头～。

2.要流泪时眼睛、鼻子感到不舒适：看到感人之处，鼻子一阵～。两眼～，泪水止不住流了下来。

3.因疾病或疲劳而感到肢体酸痛无力：站了一天了，两腿～。

1. 发出酸味。

2. 感到疲惫无力。

   《金瓶梅词话》第六七回：“ 西门庆 道：‘不瞒你説，像我晚夕，身上常时发酸起来，腰背疼痛，不着这般按捏通了不得。’” 老舍 《骆驼祥子》三：“他的头有些发晕，身上潮渌渌的难过，头发里发痒，两脚发酸，口中又干又涩。”

3. 感到难过；觉得难受。

   老舍 《二马》第三段十五：“进去之后，闻着屋里淡淡的香粉味，心里又不由的一阵发酸。” 段荃法 《凌红蝶》：“这段话， 红蝶 不止一次地听丈夫说过。一提起它，她心里就发酸。” 杨朔 《三千里江山》第十五段：“ 郑超人 心里一阵翻腾，蒙上头，鼻子直发酸。” 权宽浮 《牧场雪莲花》：“我吃不下去了，只觉得鼻子有些发酸，急忙走进帐篷取那束雪莲。”

• She strained forward trying to hear and soon she found her muscles aching from tension .

  她侧着耳朵仔细听着，一会儿就觉得浑身肌肉都紧张得发酸起来。

• Perhaps in the eyes acetify on some astigmatism, and this appears to have no major advantages that some lots still much to do.

  也许，专注得眼睛发酸，有些散光，这才发现有些看来并无特大优势的地段，仍大有文章可做。

• That if the symptom being pregnant has leucorrhea is abnormal , the body aches slightly all over , the temperature rises status?

  怀孕的症状有没有白带异常，身体全身发酸，体温升高的状况？

• I do not know when, my eyes have been sour, up the layers of mist!

  不知什么时候开始，我的眼睛已经发酸，升起了层层雾气！

• She was not hungry at all, but weak, and her eyes were tired, straining at the one point where the eye-punch came down.

  她一点也不饿，可是已经精疲力尽了。眼睛一直盯着打鞋孔的地方，也累得发酸。

• Horrible screeches came through the metal as the thing clawed at the door. Chase was covered with sweat and blood.

  那工具在用爪子抓门，令人牙齿发酸的刺耳噪音透过金属大门传到这一边儿。

• I immersed in thought, until the neck sour, I only bowed his head, and his party Qinglei dripping on my back of the hand.

  我沉浸在思想中，直到脖子发酸，我才低下头来，一行清泪滴落在我的手背上。

• He looked at the two in the dark with flashing lights under the gentle radiance of copper rings, was nose acetify .

  他看着两枚在昏暗灯光下闪着质朴光芒的铜戒指，禁不住鼻子发酸。

• Now , there's another fatty acid , capric acid, which is just like the other two, except that it has two more carbon atoms .

  现在，还有另一种脂肪酸叫做羊蜡酸（发酸），与前面提到的两者非常相似，它只不过又多了两个碳原子而已。