My candidate year was spent in the motherhouse, teaching chemistry and second year Latin at Notre Dame Institute.
我在女修道院会受训一年，教化学，第二年在圣母学院教拉丁文。
英语百科
Motherhouse
The term motherhouse is used by religious institutes to designate the principal house or community for that group. It can be for the entire institute or a region.
It would normally be where the residence and offices of the religious superior of the institute would be located. If the institute is divided geographically, it is referred to as the provincial motherhouse and would be where the regional superior would be in residence.