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- Yellow ketone is a colourless organic compound, natural yellow dyestuffs are mostly hydroxyls or first oxygen base substituents of yellow ketone or yellow ketone alcohol. 由于天然染料分子结构各不相同，染色方法也有较大差异。
- The runner was retired put out at first base. 跑垒者于第一垒上被刺杀出局。
- The runner went to second base on a wild pitch. 一记瞎设让跑垒员跑上了第二垒。
- You cannot enter a military base without a permit. 无通行证者不得擅入军事基地。
- Her heavy industry rests on a broad and firm base. 它的重工业有广泛坚实的基础。
- He caught me off base with that question. 他的问题猝然把我给问倒了。
- The bombers swooped on the air base. 轰炸机突袭空军基地。
- Many languages have Latin as their base. 许多语言都以拉丁语为基础。
- His base conduct was condemned by everyone. 他的无耻行为受到所有人的谴责。
- His idea is completely off base. 他的想法大错特错。
- Two soldiers dismounted the gun from the base. 两个战士把炮从底座上卸下来。
- base substituents 代碱剂
- In a poor, lowly, or base manner. 简陋地，谦卑地，卑鄙地
- The sea washes the base of the cliffs. 海水拍打著悬崖的底部。
- To betray a friend is a base action. 背叛朋友是卑劣的行为。
- The pilot was trying to make contact with his base. 飞行员正试图与基地联系。
- There used to be a military base in the region. 这地区过去有个军事基地。
- An acid can react with a base to form a salt. 酸可以和碱起反应而生成盐。
- The ex-convict found a base employment for himself. 那个过去被判过刑的人找到了一份卑微的工作。
- His arguments had a sound economic base. 他的立论在经济方面是有充分根据的。
