查询词典 f.c.

One of the halogens, it is a deep red, fuming liquid at ordinary temperatures (freezing point 19 F [-7.2 C]; boiling point 138 F [59 C]) that contains diatomic molecule s (Br2), and it does not occur free in nature.

是一种卤素，深红色，常温下以发烟液体形式存在(熔点︰-7.2℃〔19℉〕。沸点︰59℃〔138℉〕)。溴的液体和气体分子都含有两个原子(Br2)，仅以溴化物形式存在。

Temperatures at its surface change dramatically, ranging from a high that can exceed 800 °F (425 °C) on the sunward side to a low of about -290 °F (-180 °C) at the end of its night.

地表温度变化很大，面对太阳的地方温度高达402℃，而夜晚温度则只有-173℃。

3M recommends filtering facepiece respirators be stored in their original packaging within climatic conditions ranging from -4°F (-20°C) to +86°F (+30°C)and not exceeding 80% RH..

使用之前务必对呼吸器进行检查，并按照使用说明进行佩戴气密性检查。

The yield of 〓-methoxyl or m-nitrocinnamic acids obtained from methoxycarbonylmethylenephosphonates and corresponding substituted benzaldehydes in the presence of is 11% or 13% higher than that obtained from those reactions without catalyst.

〓 [注：表中ρ、〓和C为式（2-5）中的相应系数和常数；γ为相关系数，F为F比值，〓为相应系数ρ、〓和C的偏差，〓和〓为相应系数的T检验，CL为置信水平，n为相关点数。表听数据系使用BJORK'S（1967）程序于Z-80计算机上计算结果。]

Clause en Kaan architectural office was founded by Prof. Ir. F.M. Claus (1956) and Prof. Ir. C.H.C.F. Kaan (1961) in 1987.They work on architecture design restauration and renovation, interior and urban planning.

克劳斯·因·康建筑师事务所1956年由费利克斯·克劳斯（1956）和卡斯·康（1961）创立，事务所业务涉及建筑设计、建筑维护和翻修、室内和城市规划。

Hostile environments. Withstands continuous exposure to 500℉(260℃), up to 2000

套管可连续暴露于500°F (260°C)的高温中而不受损坏，高达2000°F (1090°C)的温度下可承

The orthogonal experiment for carbonization process indicated that the heating rate and the final carbonization temperature showed more significant influence on the properties of aerogels than the holding time did.

采用IR分析技术跟踪C〓F气凝胶的热解过程，发现400～600℃之间样品中出现石墨化结构的红外活性振动，表明炭气凝胶的微结构中开始有乱层石墨化微晶出现。C〓F气凝胶是典型的中孔材料。

The purpose of the plastic bag is to maintain very high humidity and to keep out fungus gnats. Fungus gnat larvae will eat the seedlings. A temperature between 20°C to 25°C (70°F to 80°F) works best.

使用夹鍊袋的目的是可以保持高湿度，并且防止蕈蚊(Fungus Gnats，长在潮湿的土壤中)，蕈蚊会吃幼苗。

At first, the rought C〓F〓 mixed gases are obtained by pyrolysis process of R22. A experimental pyrolysis device is designed and made by ourself. The optimum operating conditions are offered in the paper. Secondly, the much efforts is on the synthesis of R134. After through the discussion of basic thermodynamics and kinetics, selecting and preparating catalyst, it is possible that the synthesis of R134 by pyrolyzed gases hydrogenation. Base on the character of catalytic process, the kinetics equation about C〓F〓 catalytic hydrogenation is established. The rate constant of the reaction is obtained through experiment data regression. In order to achieve higher yield of R134, some optimum technological conditions is determined.

论文首先对R22裂解制成四氟乙烯混合原料气的裂解过程进行了讨论，自行设计和制作裂解反应装置，并确定裂解反应的最佳操作条件；然后，重点对R134的合成进行基础研究，分别从热力学和动力学的角度探讨以含四氟乙烯的R22裂解混合气为原料合成R134这一全新工艺的可能性，选择和制备加氢催化剂，根据催化过程特点建立四氟乙烯催化加氢反应的总包动力学方程，并在此基础上自行设计和制作中试合成装置，获得了以裂解混合气为原料合成R134的最佳工艺条件，为R134的工业化生产提供了必要的理论依据和实验基础。

For C/N of hog manure is lower than that of straw, quick-acting nitrogen in soil of the treatment applied M F was immobilized less than that applied C or W F.

因此，有机肥与化肥配施的各个处理在玉米拔节期，必需适量追肥，以满足玉米生育后期生殖生长的需求。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。