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- Results:X412 has a molecular weight of 444.It is identified as an unknown compound with the structure of ergosterol. 结果:分离得到的化合物X412的相对分子质量为444,波谱解析和文献检索初步推定其为麦角甾醇类新化合物。
- Produced by Pseudomonas syringae pv. tagetis is an unknown compound that affects chloroplast thylaloid membranes.Affected plants may turn white especially near growing apices. 丁香假单胞菌万寿菊致病变种产生的一种未知化合物，使植物变白，尤其是生长点处。
- Other unknown compounds in human milk must stimulate a baby's own production of secretory IgA, lactoferrin and lysozyme. 其他一些未知的母乳中的成分可以刺激婴儿本身产生SIgA，乳铁蛋白和溶菌酶。
- An unknown compound gives a copious yellow precipitate 大量黄色沉淀
- The leading role is played by a complete unknown. 演主角的是一个毫无名气的演员。
- The star of the film is a previously unknown actor. 这部电影里的明星以前是个默默无闻的演员。
- Its greater part is unknown to me. 它的大部分对我是未知的。
- He was an unknown painter one year ago. 一年前，他还是一个不为人知的画家。
- Oxygen enters into many compound bodies. 氧是许多化合物的组成部分。
- This is a fact hitherto unknown. 这是一个至今无人知道的事实。
- A quantity of unknown numerical value. 未知数数值不明的一个数量
- Kate is in bad with Lucy for some unknown reason. 因为某些不为人知的原因，凯特和露西关系不好。
- We use x as the symbol for an unknown quantity. 我们用x表示一个未知数。
- It is no safe wading in an unknown water. 不知水深浅，涉水不安全。
- The investigation was tabled for reasons unknown. 不知何故调查延缓进行。
- Air is a mixture, not a compound of gases. 空气是气体的混合物，不是化合物。
- The ownership of the house is still unknown. 这栋房子的所有权至今无人知道。
- The unknown number can be calculated from the data. 通过已知数可以算出未知数。
- Rose is a plant with compound leaves. 玫瑰是复叶植物。
- "Broad-shouldered" is a compound word. "Broad-shouldered"是个复合字。
