I must play my spare time well, or I end up doing nothing.
我必须善于利用空闲的时间,否则生命将会在无所事事中告终。
Over the years, one may well become a authority on one's hobby and will very probably be asked to give informal talks to little gatherings and then,
一人积了多年经验会成为自己这种爱好的权威,很可能应邀在小型集会上作非正式的讲话。