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When the molar ratio of 2 chloroacetic acid∶ p chlorophenol is 1.25 and pH=5～7 at 104 ℃ reaction for 20 min in the 20% NaOH solation,the yield of PCPA can be reached 90%.

氯乙酸∶对氯苯酚为 1 2 5 ，质量分数为 0 2的氢氧化钠溶液中，pH值在 5～ 7之间，温度在 10 4℃左右为宜，反应时间为 2 0min ，PCPA收率为 90 3%。

Characteristics of axial light intensity of planar wave diffractedby small circular aperture.

陈建农，闫金良，王德法，于永江，"受孔径约束抛物面折射系统的分数傅里叶变换"，中国光学快报 5，

At high colloid concentration, the increase is as much as 100%.

在高的胶体体积分数区，这种增加可达一倍。

Inhibition ring tests show that when the detergent is diluted to 0.2%,the ring diameter sizes for Staphylococcus aureus and colon Bacillus are 28.8 mm and 11.5 mm respectively.

采用抑菌环法做抑菌实验，该抗菌洗洁精在稀释至质量分数为0.2%时，对金黄色葡萄球菌和大肠杆菌的抑菌环直径分别为28.8 mm和11.5 mm。

An integer that is a common multiple of the denominators of two or more fractions.

一个整数是两个或两个以上分数分母的公倍数。

"In a simple fraction, both are integers. A complex fraction has a fraction in the numerator or denominator."

简分数的分子和分母都是整数；如果分子或分母本身也是分数，则称为繁分数

"In a simple fraction, both are integer s. A complex fraction has a fraction in the numerator or denominator."

简分数的分子和分母都是整数；如果分子或分母本身也是分数，则称为繁分数

Nowadays grade is the only standard to measure the complishment of student.

现在考试分数是衡量学生学业成绩的唯一标准。

You may find that your score on this Portuguese test is not consistent with other tests you have taken.

您可能会发现，你的分数就这一葡萄牙语测试不符合其他测试你采取。

Six months after initiation of crossover treatment, left-ventricular ejection fraction continued to improve modestly in both groups.

在接受交叉治疗后的六个月后，左心室射出分数（left-ventricular ejection fraction）在两组中持续适度地进展。

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％。