即他们必须并以正确的方式，分期地训练。
他说自己从来不用忍饥挨饿，但靠着父母上门推销分期付款的商品所挣的收入，也只能缩衣节食地过日子。
He says he never went hungry, but his parents made only a modest living selling merchandise door-to-door, on instalment plans.
洹北商城是近年夏商考古的一项重要发现，它为商文化分期序列的完善和商代都邑地望的研究提供了新的资料。
Shang City is an important discovery in recent Xia and Shang archeological research, which provides new data to the research of Shang Capitals and chronological order of Shang culture.
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