They lack the expertise to make capital investments.
出自-2011年6月听力原文
If these investments generate huge social benefits—as they clearly do—the benefits of providing more social support for the family should be that much clearer.
出自-2010年6月阅读原文
In fact, by some estimates, the value of parental investments in children, investments of time and money (including lost wages), is equal to 20-30% of gross domestic product.
出自-2010年6月阅读原文