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In addition, significant different copper isotope variation exists between primary native copper in North America and chalcopyrite and chalcocite. In general, the latter two copper minerals are major sources for smelted copper.

综合上述分析结果认为，铜同位素分析技术在区分北美本土自然铜以及在区分欧洲冶炼铜和北美自然铜等考古研究中具有较大的应用潜力和广阔的发展前景。

The content of stock option scheme design includes the sources and channels of needed stocks of stock option's exercising rights, the authorization and exercising of stock option, the granting chance and quantity of stock option, the determination of premium of stock option, the implementing methods of stock option, right transfer and loss, and the management of stock option plan.

股票期权方案设计的内容包括股票期权行使权所需股票来源和渠道、股票期权的授予和行使、股票期权的授予时机和数目、股票期权行权价的确定、股票期权的执行方法、权利变更及丧失、对股票期权计划的管理等。

Other great sources of vitamin A are dark green vegetables, such as Swiss chard, broccoli, spinach and beet greens.

其他大来源，维生素A的深绿色蔬菜，如甜菜，花椰菜，菠菜，甜菜，洋洋洒洒。

Tailed Han×Charolais of 3-month-old in age were used and the experiment was a 2×2 factorial (two Se levels and two PUFA sources) design.

研究日粮中不同硒水平和不同来源多不饱和脂肪酸对绵羊血浆和红细胞膜脂肪酸组成及抗氧化的影响。

Many sources list his place of birth as Chattanooga, Tennessee.

许多消息人士的名单，他出生地点作为查塔努加，田纳西州。

But other sources say the plane had just undergone a service. A thorough check is routine before a flight.

但其他消息来源说，飞机刚刚接受一项服务，飞行前的一次彻底的例行检查。

This lesson examines sources of presidential power and ways that checks and balances limit presidential power.

这一课考察总统权力的资源和权力制衡限制总统权力的方式。

Rikyu liked the atmosphere of loneliness closed, so the use of point light sources to create space for a strong chiaroscuro to highlight the feelings of seeking the correct path.

利休喜欢封闭孤独的气氛，所以使用点光源，制造明暗对比强烈的空间，突显求道之心情。

Taxation is one of the chief sources of state finance. It influences the benefits of a person who pays his tax.

税收是国家财政收入的主要源泉之一，同时又影响着纳税人的财产利益。

Xinhua frozen for export to South Korea and domestic urn chili pepper processing enterprises with the best sources.

本社为向韩国出口冷冻金塔辣椒和国内辣椒深加工企业提供最优质的货源。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。