To make beating heart muscle, researchers needed to figure out just which cells were the ones that they needed.
为了制造出肌细胞组织，研究者们需要弄清楚那些前体细胞是必要的。
What's the point in living a permanently stressed-out, albeit successful, life, if one drives away friends and loved ones, and dies of a heart attack at an early age?
如果一个人长期过着一种虽然成功但压力过重的生活，众叛亲离而且由于心脏病发作英年早逝，这又有什么意义呢？
As it turns out, dads are the ones taking their child's departure to heart.
结果往往是，爸爸是那个带领孩子的心灵出发的人。
Heart goes out to the ones who lost their loved and dear ones.
心出去的那些谁失去了亲人和亲人。
Heart goes out to the ones who lost their loved and dear ones.
心出去的那些谁失去了亲人和亲人。
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