" Have you studied the modern developments of philosophy in America" ?

“你研究过美国哲学的现代发展” 吗？

These are the success stories of smart and modern development aid.

这些是智能和现代发展援助的成功案例。

While some features of the rings suggest that they were formed when the plant formed an estimated 4.4 billion years ago, other properties suggest that they're actually more of a modern development.

虽然环的一些特征表明它们是在大约 44 亿年前植物形成时形成的，但其他特性表明它们实际上更像是一个现代发展。