As a matter of fact, I have very little spare time these days. My studies are so important to me that I have given up all my other activities. For example, I used to love playing tennis, but these days I simply do not have the time. In addition, I used to swim often, as I believe it kept me fit without the danger of being injured.
adj. 多余的,闲置的,备用的,简陋的
v.