In light of Cooperative Principle and Politeness Principle, the two important principles in pragmatics, the author analyzes by cases how to write polite and effective business letters conveying negative information.

Cooperative Principle and Polite Principle in Letters of Foreign Trade

外贸函电中的合作原则和礼貌原则

The police's moral character and the influence sent forth from it are formed on the basis of being well versed in both polite letters and material arts.

人民警察的文化魅力是人民警察在文武双全的基础上形成的道德品质及其所散发出的影响力和感召力。

He was eliminated in the very first round.

他在第一轮比赛中就被刷下来了。

He eliminated all his political rivals.

他铲除了所有政治对手。

I was eliminated from the 400 metres in the semi-finals

我在400米半决赛中被淘汰。

The radio station claimed that 87,000 'reactionaries' had been eliminated.

广播电台声称已经消灭了87,000名“反动分子”。

Academic departments are being eliminated

纯理论研究院系即将被裁撤。

The water body energy impelled the ferruginous colloids or suspended matter to rotate around quartz fragments or the preexisting microgranular iron minerals as euhedral crystals to form the ooids ( with nuclei or without nuclei).

鲕粒环带的形成，与水体波动能量使铁质围绕碎屑矿物，或围绕先已形成的自形晶微粒铁矿物旋转有关。

More important, it is the Chicken McNugget of the prairie-a convenient snack food for almost every creature, from burrowing owls and ferruginous hawks to foxes and even wolves.

更重要的是，它就像是草原的麦乐鸡，一种几乎可以为各种草原动物提供的方便小吃，从穴鸮和铁鹰到狐狸，甚至狼。

The current situation and progress on the applications of vitriolic slag are briefly introduced, some development trends of comprehensive utilization of vitriolic slag such as manufacturing ferric or ferrous salt, ferruginous pigment, magnetic powder are suggested.

简要介绍了硫酸渣的研究现状，提出了利用硫酸渣开发铁盐、铁系颜料、铁基磁粉等，是今后硫酸渣综合利用的发展方向。

The studies indicate that the material source of this type of lateritic gold deposit is Au-rich rocks and/ or ores with high siliceous material ( quartz SiO2) and rich ferruginous material ( pyrite etc.).

研究表明，本类红土型金矿的物质来源是高硅质（石英）、富铁质（黄铁矿等）的富金矿（岩）石；

As the iron-based crucible for melting magnesium and its alloys is easy to oxide and erode. at high temperature, the service life of ferruginous crucible and the quality of magnesium alloy are severely affected.

镁及镁合金熔炼用铁质坩埚在高温下易氧化腐蚀，严重影响坩埚的使用寿命和合金的质量。

On the condition of guaranteeing the quality of sinter and stability of productive process, the sintering process of adding ferruginous waste such as steel-making slag, iron oxide scale and dust separately is analyzed.

在保证烧结矿质量、生产过程稳定的条件下，探索在烧结工艺中单配钢渣、氧化铁皮、除尘等钢铁废料。

It is preliminary considered to be a remobilized structure-hydrothermal native Pt deposit associated with Cu sulfide-V-Ti magnetite mineralization in layered ferruginous basic-ultrabasic rocks.

初步认为该矿床类型属产于层状铁质基性超基性岩与铜硫化物钒钛磁铁矿有关的构造热液再活化型自然铂矿床。

The asbestos fiber becomes coated with iron and calcium, which is why it is often referred to as a "ferruginous body" as seen here with an iron stain.

石棉纤维被铁和钙包裹，这就是采用铁染色法染色发现含铁体的原因。

Diagenetically authigenic minerals are dominantly kaolinite, chlorite, siliceous, and ferruginous calcite.

成岩自生矿物主要有高岭石、绿泥石、硅质、铁方解石。

Basins in Jiangxi province mostly are red basins dominated by sandy conglomerate, and some conglomerate and sandstone with calcareous and ferruginous cementation.

省内盆地多为红盆，岩性以砂砾岩为主，其次为砾岩和砂岩，胶结物以钙质和铁质为主。

Application of Cooled Agglomerated Pellet with Ferruginous Gas Mud in Sintering Process of Baotou Steel Iron ores ( sinter and pellets)& Determination of bulk density

含铁尘泥冷固结球团在包钢烧结生产中的应用GB/T14202-1993铁矿石（烧结矿、球团矿）容积密度测定方法

Erosion mechanism of ferruginous crucible for melting zinc was lucubrated, and several methods which can improve corrosion resistance and service life of ferruginous crucible were introduced.

详细论述了熔锌铁质坩埚的腐蚀机制，介绍了几种能够有效改善铁质坩埚抗腐蚀性能、提高坩埚使用寿命的方法。

Firstly, the fly ash is separated into three parts according to its mineralogical composition, they are ferruginous spheres, mullite-corundum and glass phases.

首先根据高铝粉煤灰的物相组成特点采用新的分离方法将之分离为三个相（或相组合）：铁质微珠、莫来石-刚玉相以及玻璃相；