You can call it a fitness trend or a mindfulness practice or a bit of both. But what    1    (exact) is forest bathing? The term emerged in Japan in the 1980s as a physiological (生理上的) and psychological exercise    2    (call) shinrin-yoku (“ forest bathing" or“taking in the forest atmosphere”). The purpose was twofold: to offer an eco-treatment to tech burnout    3    inspire people to reconnect with and protect the country's forests.

The Japanese quickly accepted this form of eco-treatment. In the 1990s,researchers    4    (begin) studying the physiological benefits of forest bathing，providing the science to support    5    we innately(与生俱来地)know: time spent immersed (沉浸) in nature is good for    6    (we). While Japan is credited with the term shinrin-yoku, the concept at the heart of the practice     7     (be) not new. Many cultures have long recognized the    8    (important) of nature to human health.

Forest bathing is not just for the wilderness-lover; the practice can be as simple as walking in any    9       ( nature) environment and connecting with what is around you. For     10     more systematic experience, you can join trained guides for a thoughtful two-hour eco-treatment journey.

Last Friday, doctors at the University of Maryland Medical Center successfully replaced     1     heart of a very sick man with a specially-grown pig’s heart. It is the first time that doctors     2     (do) this surgery by now. After three days, the patient appears to be doing very well. Dr. Bartley Griffith who is the first surgeon     3     ( perform ) the operation, said this had never been done before. David Bennett, 57, is the man offered the heart. He was given special     4     (permit) to have the unusual operation because without it, he would have died.

Transplants (移植) usually come from people who have died, but want     5     (they) organs to be used to help other people live. There are far     6     (large) numbers of patients who need organs than those of organs. Over 3,800 Americans got heart transplants last year. But there are     7     (rough) 110,000 people who are waiting for some kind of transplant. For years, scientists have tried to figure out     8     they transplant organs from other animals into humans. This is hard because the human body almost always rejects something that isn’t its own.

Muhammad is one of the     9     (doctor) who helped perform the surgery. He’s been working to develop methods to help prevent pig organs     10     being rejected in humans. Doctors are watching Mr. Bennett’s recovery.