Many people around the world keep pets. In many countries, one out of every four families has at least one pet. Pets are good for us in many ways. We play with them and they make us laugh. Pets help us relax and they keep us from feeling lonely. Recently, scientists have found that pets can actually extend your life. They studied people with heart disease. 28% of patients without pets died within a year. Only 6 % of those patients who had pets died in one year. many countries, people take with them. They hope that it will make the patients feel better quickly.
해석은 필요없구요.위의 빨간 글씨인 within 과 in이 어떻게 쓰이는지 알려주시구요.it은 무엇을 뜻하는지 알려주세요.~~~~~