Thus varying the nature of r from primary to secondary to tertiary alkyl results in increasing yields of the hydroxy ethers . 当R按伯、仲、叔烷的顺序递变，则所得羟基醚的产率就随之而增高。
2.
Thus varying the nature of r from primary to secondary to tertiary alkyl results in increasing yields of the hydroxy ethers 当r按伯、仲、叔烷的顺序递变，则所得羟基醚的产率就随之而增高。
