對於學生來說，在學校的時間會占大多數，可能無法花30個小時的時間去陪伴

對於學生來說，在學校的時間會占大多數，可能無法花30個小時的時間去陪伴老年人。

結果 (英文) 1:

For students, the time at school will be the majority, and it may not be possible to spend 30 hours with the elderly.

結果 (英文) 2:

For students, most of their time in school may not be able to spend 30 hours with the elderly.

結果 (英文) 3:

For students, the time spent at school will be the majority, and they may not be able to spend 30 hours with the elderly.