例句 Child development is relational, which is why, in one experiment, nine month-old babies who received a few hours of Mandarin instruction from a live human could isolate specific phonetic elements ...

BELGRADE, Feb. 1 (Xinhua) -- The Lajkovac-Valjevo motorway in Serbia, built by China's Shandong Hi-Speed Group, was officially inaugurated on Saturday, marking the full completion of the main route.