Reducing power, metal chelating ability and metal contents of the pure natural melanin from Osmanthus fragrans' seeds was studied.
结果表明,该天然黑色素的还原性比人工合成抗氧化剂BHT强,且随着黑色素浓度的增大而增强;同时该黑色素与金属铁离子鏊合能力非常有限,在0。
Black wheat contains rich natural melanin.
黑粒小麦76富含天然黑色素,全粉蛋白质含量高达17。
chlorophosphate, metal (excl, natural lead ore)
金属氯磷酸盐（不包括天然铅矿）
chlorovanadate, metal (excl. natural lead ore)
金属氯钒酸盐（不包括天然铅矿）
Today large quantities of lead still go into the manufacture of rolled sheet and extruded pipe.
今天，大量的铅仍然用来轧制成铅板或挤压成铅管。
Determination of Copper, Cadmium and Lead in Natural Water by Ionexchange-Atomic Absorption Technique
离子交换—原子吸收法测定天然水中的铜、镉、铅
On-Line Determination of head in Water by FAAS with Flow injection Exbraction;
流动注射在线萃取FAAS法测定天然水中铅
The results indicated that large amounts of non-natural silver grains existed in this branch of lead concentrates and the silver grains were distributed around the galena in a loose flocculating form.
结果表明，此批铅精矿含有大量的非天然银矿物，银颗粒呈疏松絮状物分布在方铅矿周围。
chromate, metal (excl. natural lead chromate, double or complex chromates and precious metal chromates)
金属铬酸盐（不包括天然铬酸铅、复或络铬酸盐和贵金属铬酸盐0
SLMULTANEOUS DETERMINATION OF Bi,Cu,Pb,Cd,Zn and Mn IN NATURAL WATER──by differential anodic stripping voltammelry
连续测定天然水中铋、铜、铅、镉、锌、锰──用微分阳极溶出伏安法
APPLICATIONS OF NATURAL ISOTOPES OF ~7Be AND ~(210) Pb IN ATMOSPHERIC SCIENCE
天然放射性核素铍-7和铅-210在大气示踪研究中的应用
Hydride generated AFS determination of trace lead in natural water after sulfhydryl cotton preconcentration
巯基棉富集一氢化物原子荧光光谱法测定天然水中痕量铅
Selection on Regenerated Catalyst for Natural Clinoptilolite after Absorbing Pb~(2+) from Wastewater and Determination of Use Condition
天然斜发沸石除重金属离子铅再生剂的选择及应用条件的确定
Natural Resources: Coal, gold, tungsten, lead, copper. uranium.
自然资源：煤、金、钨、铅、铜、铀。
that against the leaden sky now revealed more fully the wonderful beauty
映衬着铅灰色的天空，
Epidemiological Study on Association of Lead, Mercury and Other Elements Exposure during Pregnancy with Congenital Malformations and Early Spontaneous Abortion;
铅、汞等重金属元素和微量元素对胎儿先天畸形及早期自然流产影响的流行病学研究
liquefied natural gas
液化天然气液化天然气 液化天然气
and Tom gave Becky the pencil and held her hand in his,
汤姆给贝基一枝铅笔，然后手把着手
My mom bought me yesterday a new pencil case.
妈妈昨天给我买了一个新铅笔盒。
I'm sorry I broke your pencil yesterday afternoon.
对不起！我昨天下午弄断你的铅笔了。