The Long Gray Line has never failed us.

Objective Purpose of the study was to investigate the content of Nickel ( Ni) and Chromium ( Cr) ion in gingival tissue and blood, and to discuss the reason of gray line in gingival after wearing non-noble Porcelain-Fused-to-Metal crown.

目的研究家兔前牙行非贵金属烤瓷冠修复后牙龈组织及血液中镍铬元素的含量，初步探讨产生牙龈灰线的原因。

Lastly, effects of annealing under high magnetic field on the structure of spheroidal graphite cast iron, gray cast iron and 45# steel were investigated. The solidification of Al-12% Si under high magnetic field was also carried out.

最后本文还分别进行了灰铁、球铁、45钢强磁场下退火处理，以及Al&12%Si合金强磁场下凝固实验，并对实验结果进行了分析。

The equipments can cast aluminum alloy, stainless steel, copper, ductile iron, gray iron, vermicular iron and different conventional metal parts.

并且可以浇铸：铝合金、不锈钢、铜、球铁、灰铁、蠕铁等不同常规金属件。

The characteristics of copper alloy Mold process and its effect on the properties of ductile iron and gray iron castings are presented in this paper.

本文介绍了铜合金金属型的特点及其对所生产的球墨铸铁件、灰铸铁件性能的影响；

Analyzes the histogram of cast iron gray image, using some segmentation methods to segment the cast iron microstructure image, such as threshold method, FCM method, Genetic method and Mathematic morphology method.

对铸铁灰度图像直方图进行分析，利用常用的分割算法：阈值化法、FCM聚类法、遗传算法和数学形态学算法对铸铁金相图像进行分割，分析了分割效果和算法的性能。

Certainly at first glance the formation of iron gray and sullen blue looked very much as if a new mountain had thrust up from the ground.

在第一眼看见那铁灰和暗蓝色的结构时确实很像一座新的山脉从地面上升起。

When saying these words, Yihe was looking iron gray, eyes casting down.

说这些话时，一禾面色铁灰，眼帘低垂。

Site Welding Repair of Gear Cast Iron Gray for Shears

剪板机灰口铸铁齿轮断齿现场焊接修复

A gray mineral consisting of cobalt arsenide and nickel; an important source of cobalt and nickel.

一种灰色矿物，由砷化钴和镍组成，是钴和镍的重要来源。

He looked down at the iron-grey head.

他低头看了看那长着铁灰色头发的脑袋。

His armor was iron-grey chainmail over layers of boiled leather, plain and unadorned, and it spoke of age and hard use.

他硬皮衣外罩上铁灰色的锁子甲，虽式样平凡，毫无装饰，却历尽沧桑，看得出岁月的痕迹。

The Yellow Cab Boy ( Luotuoxiangzi) is Lao She's representative work, in which one of the major art achievement is shown by reasonably arranging sub-characters around the hero "xiangzi".

《骆驼祥子》是老舍的代表作，围绕主人公祥子合理设置次要人物是它的主要艺术成就之一。

But the real "Romney risk" for the yellow metal has nothing to do with fiscal policy.

但对于黄金而言，真正的“罗姆尼风险”与财政政策没有关系。

After all, the yellow metal cannot be eaten, burnt or used to power a car.

毕竟，这种黄色金属不能吃、不能烧，也不能用来发动汽车。

Has the bubble burst for the yellow metal?

关于这种黄澄澄金属的泡沫破灭了吗？

Perhaps the most obvious place for investors to put money now is in the yellow metal.

目前，对投资者来说，最显而易见的避风港也许就是黄金。

That popular notion has long fueled the rise of the yellow metal.

大多数人秉持的这个观点长期以来一直在推动金价上涨。

The yellow metal declined a phenomenal 29.3 per cent.

黄金价格下跌了惊人的29.3%。

The research about the resistance to abrasion of yellow metal and aluminum bronze

关于黄铜、铝青铜的耐磨性能的研究

Give the green light to sb.

给某人开绿灯，批准某人。