排忧解惑-二姐不比忧虑

这个是科学家一家之言，他们也是研究了一个方面；youtube上说的也应该可行：that if an adult can spend 5 years staying in the same environment that a baby is in and focusing on learning a new language, s/he can do as well as a baby does。但同从小孩时学起的相比还应该有点区别。
那个百老惠的男演员学的不就很地道了吗。