四重的

When lactide was purified byethyl acetate for 4 times, it was pure enough to polymerize to be PLA.

以乙酸乙酯作为重结晶溶剂，当重结晶次数达到四次后，其纯度已达到丙交酯聚合的基本要求。

Neither tetrose nor mannan group had metastasis of the liver, and the weights of liver in the two groups were significantly lower than in the control.

四糖组及甘露糖聚组均无肝外转移发生，两组小鼠的肝脏湿重也明显低于对照组。

This old man, he played three, He played knick-knack on my tree; With a knick-knack paddywhack, Give a dog a bone, This old man came rolling home.

这个老人，他演奏了四；他在我的门演奏了小玩意儿与小玩意儿，稻重击，给狗一根骨头；这个老人回家了辗压。

Philippe Halsman was convicted of patricide and sentenced to ten years in prison .

在短短的四天时间里，这场轰动一时的重案审判以菲利浦弑父罪名成立并判处十年监禁而宣告结束。

In a mere four days, the highly-charged, emotional trial came to a close. Philippe Halsman was convicted of patricide and sentenced to ten years in prison .

在短短的四天时间里，这场轰动一时的重案审判以菲利浦弑父罪名成立并判处十年监禁而宣告结束。

As your quadriceps get stronger, you can increase the amount of weight and repetitions that you perform.

若你的股四头肌变得比较强壮，可以增大压重和重复次数。

It has four Rolls-Royce Merlin engines, but the group will need to have only three of them rebuilt.

它有四台Rolls-Royce Merlin发动机，但这个小组只需要重造其中的三个就够了。

The electrolyte buffer for the anion separation consisted of 40 mmol/L boric acid -1.8 mmol/L potassium dichromate -2 mmol/L sodium tetraborate (pH 8.6), and tetramethyl ammonium hydroxide was used as electro-osmotic flow modifier.

阴离子测定采用的缓冲体系为40mmol/L硼酸-1.8mmol/L重铬酸钾-2mmol/L硼酸钠(pH8.6)，氢氧化四甲铵为电渗流改性剂，5种阴离子在4.6min内达到基线分离，检出限为0.10~1.85mg/L。

Whitening sunscreen containing emollients series "triple whitening" new formula, combining components of vitamin E moisture,净白cream and sunscreen factor, so that your skin in four weeks more white, more health, in accordance luster and shine .

玉兰油美白防晒润肤系列含有"三重美白"新配方，结合维他命E滋润成分，净白精华和防晒因子，令您的肌肤在四星期内更白皙，更健康，并焕发润泽光彩。

The main structure uses the design of the ellipse trochoid of the 4 bar strider. We made the ellipse trochoid to be the optimum state for reaching the simulation effect when people are running. Besides, the design can switch to be a new six-bar strider. It uses a link bar to bind the axis pillar and the pedal also made the pedal slide free to reach the sport effect.

研究内容主要著重於二合一椭圆机之椭圆轨迹最佳化及机构运动合成，主要构造系利用一四连杆椭圆机之设计方式，并将其椭圆轨迹最佳化，以期更符合模拟人跑步时的步伐；另外，此设计亦可转换为一新型之六连杆踏步机，其系利用一连杆连接踏板及中心柱，并使踏板可在滑槽上自由移动，使其可达到踏步之运动效果。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。