1·The exercise consists of stretching and contracting the leg muscles.
此项训练包括伸展和收缩腿部肌肉。
—— 《牛津词典》
2·The wafer is a piezoelectric resonator, expanding and contracting in response to electrical voltages at a precise, extremely high frequency.
该晶片是一个压电谐振器，以精准而极高的频率对电压作出反馈，进行放大和收缩。
3·With extraordinarily acute vision, "you'd see it expanding and contracting."
用异常敏锐的眼光观察，“你会看到它放大和收缩。”
4·To make the shaft turn, the muscles work in concert, rhythmically contracting, one pair after another.
为了使传动轴转动，所有肌肉必须协调一致，一组接一组有节奏地收缩。
5·As the application heap requirements change, the GC can respond by expanding or contracting the heap.
随着应用程序程序堆需求的变化，GC可以通过扩大和收缩堆做出反应。
1·Despite the progress achieved since 1988, as long as a single child remains infected with poliovirus, children in all countries are at risk of contracting the disease.
尽管自1988年取得了进展，但只要有一名儿童仍然受到脊髓灰质炎病毒的感染，所有国家的儿童就都有感染该病的危险。
2·As long as a single child remains infected with polio, children in all countries are at risk of contracting the disease.
只要还有一名儿童感染有脊髓灰质炎，所有国家的儿童就仍有感染该疾病的危险。
3·The ministry says outbound travellers for German and its neighboring countries after April are in highly at risk of contracting the disease.
卫生部称，四月份以后出境前往德国和其邻近国家的旅客极其可能感染该疾病。
4·In fact, by shunning science, organic producers could be increasing consumers' risk of contracting Escherichia coli and other food-borne diseases.
实际上，由于回避科学，有机食品行业可能会增加消费者感染大肠杆菌和其它通过食物传播疾病的风险。
5·First, HIV cannot live outside the human body for more than a few minutes so the chances of somebody contracting AIDS from a needle sitting in a seat are slim to none.
第一，艾滋病毒在离开人体几分钟之后就无法存活，所以坐在座位上被针扎后感染艾滋病的机率几乎是零。
1·In some cases, entire industries have been contracting and will continue to shrink.
有时候，整个行业都已经缩小了，并且会持续缩减。
2·At the aspect of the experiment, the domestic start to adopt the calculator test technique, thus contracting with abroad the margin that forerunner is horizontal.
在试验台的研究方面，国内普遍开始采用计算机测试技术，从而缩小了与国外先进水平的差距。
3·The workforce is expanding, not contracting.
劳动力需求正在不断扩大而非缩小。