Rowland

• ring [物]罗兰环(用磁性材料制成, 用以研究材料的性能)

Rowland的用法和样例：

例句

1. Rowland hill, a schoolmaster in England, is the first to put forward a proposal to use stamp to cover postage.
   罗兰·希尔，英国的一位小学校长，第一个提出用邮票来支付邮费。
2. It was very sad; Rowland, after a year's separation, decided to return to her husband, but he refused to have her back.
   真是遗憾; 罗兰离开丈夫一年以后决定回到丈夫的身边，而她丈夫却拒绝了。