China's defense expenditure is low in relative terms,as well as in absolute terms. 中國國防支出的低水平，不僅反映在國防費的絕對值上，而且也反映在國家國防負擔的相對比例上。
The paucity of nitrogen suggests that the heavy elements came mostly from high-mass stars, which produce less nitrogen relative to other heavy elements than low-mass stars do. 氮的匱乏，代表重元素大多來(lái)自于大質(zhì)量恒星，因為大質(zhì)量恒星所產(chǎn)生的氮與其他重元素的相對比例，通常較小質(zhì)量恒星的少。
