您要查找的是不是：
- a word of unknown origin 来源不明的词
- A disease of unknown origin or cause. 疑难病症来源或起因不明的疾病
- "Stomach" is a word of Latin origin. 是源自拉丁语的一个词。
- That's bullshit! I don't believe a word of it. 胡扯!我一点也不信。
- He spoke scarcely a word of English. 他几乎连一个英文单词都不会说。
- Much of it is of unknown origin. 其中大部分内容出处不详。
- Promise me you won't breathe a word of this to anyone. 答应我别将此事泄漏给任何人。
- This truck is of unknown origin. 这辆卡车来历不明。
- Only on very rare occasions does he give you a word of praise. 他难得称赞你一句。
- I tried hard not to lose a word of his lecture. 我努力想听清他讲课讲的每一字每一句。
- Don't worry, I wouldn't breathe a word of your secret. 不要担心，关于你的秘密，我决不会泄漏一个字的。
- I did not lose a word of his speech. 他的演说我没有听漏一个字。
- He must be talking through his hat! I don't believe a word of what he has said. 他一定在胡说八道！他说的每一句话，我都不相信。
- He had difficulty edging in a word of his own. 他好不容易插进了一句话。
- He bore the pain without a word of complaint. 他一声不吭地忍住了疼痛。
- It is a benign rapidly growing hemorrhagic lesion of unknown origin. 回顾文献记载，大部份的鼻腔内小叶状毛细血管瘤病例年龄分布在成人，罕见于小孩子。
- He never uttered a word of protest. 他从来没说一句反对的话.
- The incidence of fever of unknown origin (FUO) in AMT was high (13%). FUO在自体供者中易发生(13%25)。
- We didn't lose a word of his speech. 我们听清了他的每一句话。
- Don't repeat a word of what I've told you. 我对你说的话一点儿也不要对别人讲。
