Methods of recovering organic solvent and three kinds of precious metals are introduced to prevent lab pollution and accident.
论述了含氰等 7类实验室常见废弃物的处理方法 ,介绍了一种有机溶剂和 3种贵重金属的回收与提纯 ,以防止实验室污染事故的发
Study of Thiacalixarene Separation/Preconcentration and Determination of Trace Noble Metal and Heavy Metal Ions with Flame Atomic Absorption Spectrometry;
硫杂杯芳烃分离富集—火焰原子吸收光谱法测定贵重金属离子的研究
To cover the surface of(an inexpensive metal)with a layer of precious metal, such as gold.
镀用贵重金属层例如金等覆盖（非贵金属的）表面
a mass of precious metal (usually in the form of bars or ingots).
一块贵重金属（通常呈条状或锭状）。
and the marking of precious metals.
度量衡方面的准则及贵重金属的标志。
Research Progress in Recovery of Noble Metals From Spent Catalysts
废催化剂中贵重金属回收的研究进展
SUMMARY OF METHODS TO RECOVER HEAVY AND NOBLE METALS FROM WASTE CIRCUIT BOARD
废旧电路板中贵重金属回收技术综述
a noble gas such as helium or neon; noble metals include gold and silver and platinum.
惰性气体，如氦和氖；贵重金属包括金、银和铂。
We are required to learn to hammer out beautiful dishes in precious metals.
要求我们学会用贵重金属敲成漂亮的盘子。
Commodity money typically is based on valuable metals, particularly gold or silver.
商品货币通常是以贵重金属，特别是以黄金或白银作为其基础的。
Gold, platinum and diamonds, among the most valuable of metals and minerals, are found in such deposits.
最贵重金属和矿物中的金、铂和钻石就是在这种矿床中发现的。
Gold is still a valuable metal but is often found in the mountain streams.
＂金子仍然是一种贵重金属，但是常常能在山里的溪流中找到。＂
"However, the exemption from or reduction of income tax on enterprises with foreign investment engaged in the exploitation of resources such as petroleum, natural gas, rare metals, and precious metals shall be regulated separately by the State Council."
但是属于石油、天然气、稀有金属、贵重金属等资源开采项目的,由国务院另行规定。
Gold is a noble metal.
黄金是一种贵重的金属。
Gold is a precious metal.
黄金是贵重的金属。
the precious metals, ie gold,silver and platinum
贵金属（金、银、白金）
bowl (tableware) of precious metal
贵金属制碗（餐具）
cigarette case, of precious metal
雪匣盒, 贵金属制
(of metals) decorated or inlaid with a wavy pattern of different (especially precious) metals.
（指金属）装饰有或镶饰有不同（特别是贵重）金属做成的波纹状图案。
a fireproof metal box (usually in a bank) for storing valuables.
放贵重物品的防火的金属箱子（通常用于银行）。