pair off

pair off的基本解释

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成对而去, 分成一对一对

与pair off相关的网络例句 [注：此内容来源于网络，仅供参考]

Starting from the feet and working up, I'm wearing: a pair of cotton socks, with a pair of thermal socks over them; a pair of ankle-high Gore-Tex boots; a set of thermal long-johns; a pair of jeans; a thermal undershirt (a present from a worried family member); a long-sleeved T-shirt; a tight-fitting cashmere jumper; a fleece; a padded winter coat with hood; a thin pair of woollen gloves (so that when I take the outer pair off to take photographs I won't expose naked flesh); a pair of gloves made of wool and Thinsulate; a wool scarf; and a woolly football hat.

我从脚上到头顶穿的是：一双棉袜、外套一双保暖袜；一双到脚踝的 Gore-Tex 牌靴子；一套保暖长内裤；一条牛仔裤；一件保暖内衣（这是一位不放心的家人送的礼物）；一件长袖 T 恤；一件紧身高领羊绒衫；一件羊皮茄克；一件带垫衬和帽子的冬大衣；一双薄羊毛手套（这样我把外层手套脱下拍照的时候，手不会暴露在外）；一双用羊毛和保温材料做的手套；一条羊毛围巾；一顶羊毛足球帽。

The entire theory systems of the punctured binary sequence pair and the punctured binary array pair are built, which include the perfect punctured binary sequence pair theory, the perfect punctured binary array pair theory, the quasi-perfect and double quasi-perfect binary array pair theory, and the punctured binary complementary sequence pair theory.

定义了屏蔽二进序列偶、最佳屏蔽二进序列偶和奇周期最佳屏蔽二进序列偶，研究了它们的变换性质和存在的组合允许条件，并用这些性质和条件，搜索出若干最佳屏蔽二进序列偶和奇周期最佳屏蔽二进序列偶。

In this paper, through a series of experiments, two series of quaternary-ammounium Gemini surfactants were synthesized, namely the pair alkylene double quaternary ammonium salt surfactant m-s-m·2Br and the pair the alkylene double quaternary ammonium salt surfactant -s-·2Br. We has carried on the attribute with the infrared spectrum to its structure, and to affected the factor which the synthesis pair the alkylene double quaternary ammonium salt surfactant responded to carry on the discussion. We has discovered the synthesis pair the ethylene double quaternary ammonium salt surfactant m-2-m·2Br optimum condition: The bromo alkane and a tetramethyl ethylene diamine mole of ratio is 3.0: 1.0, makes the solvent by the ethyl alcohol, 80℃ under responds for 48 hours in the backflow temperature; Synthesis pair alkylene double quaternary ammonium salt surfactant 12-S-12 ·2Br optimum condition: 12 tertiary amine and 1, 3- propylene dibromide (1, 4- two bromines butane) a mole of ratio is 2.2: 1.0, makes the solvent by the ethyl alcohol, responds for 48 hours in the constant temperature 80 ℃ under backflow.

本文通过一系列的实验，合成了两个系列的Gemini型表面活性剂，即双烷撑双季铵盐表面活性剂m-s-m·2Br和双烷撑双季铵盐表面活性剂-s-·2Br，用红外光谱对其结构进行了表征，并且对影响合成双烷撑双季铵盐表面活性剂反应的因素进行了讨论，找出了合成双乙撑双季铵盐表面活性剂m-2-m·2Br的最佳条件：溴代烷与四甲基乙二胺的摩尔比为3.0：1.0，以乙醇作溶剂，在回流温度80℃下反应48小时；合成双烷撑双季铵盐表面活性剂12-s-12·2Br的最佳条件：十二叔胺与1，3-二溴丙烷(1，4-二溴丁烷)摩尔比为2.2：1.0，以乙醇作溶剂，在恒温80℃下回流反应48小时。