Объясните, какое значение придают всему предложению выделенные формы глагола, и переведите предложения на русский язык.

Although machine-building has been a branch of human activity for centuries, only in the 20th century have machines begun to assume such an all-important role. 2. The engineer had visited many plants and designing offices, he had personally examined a great deal of different types of machines and had done a lot of work on his thesis, before performing a large number of experiments. 3. I'd like to know whether the series of experiments I have already performed and the data which I have obtained are enough. 4. These remarkable technological achievements have become possible by specially designed mechanisms and machines. 5. Man has obtained ultrahigh and ultralow temperatures, ultrahigh vacuums, superhigh pressures, ultrahigh strength, superelastic and superconducting materials and has been able to study the interaction of superhigh-energy particles.

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Английский язык

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25 сентября, 18:23

Объясните, какое значение придают всему предложению выделенные формы глагола, и переведите предложения на русский язык.

Although machine-building has been a branch of human activity for centuries, only in the 20th century have machines begun to assume such an all-important role. 2. The engineer had visited many plants and designing offices, he had personally examined a great deal of different types of machines and had done a lot of work on his thesis, before performing a large number of experiments. 3. I'd like to know whether the series of experiments I have already performed and the data which I have obtained are enough. 4. These remarkable technological achievements have become possible by specially designed mechanisms and machines. 5. Man has obtained ultrahigh and ultralow temperatures, ultrahigh vacuums, superhigh pressures, ultrahigh strength, superelastic and superconducting materials and has been able to study the interaction of superhigh-energy particles.

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Варнер · Answer 1

Несмотря на то, что машиностроение веками было отраслью человеческой деятельности, только в XX веке машины стали играть такую важнейшую роль. 2. Инженер побывал на многих заводах и конструкторских бюро, лично осмотрел большое количество различных типов машин и проделал большую работу над диссертацией, прежде чем провести большое количество экспериментов. 3. Я хотел бы знать, достаточно ли серии экспериментов, которые я уже провел, и данных, которые я получил. 4. Эти замечательные технологические достижения стали возможными благодаря специально разработанным механизмам и машинам. 5. Человек получил сверхвысокие и сверхнизкие температуры, сверхвысокие вакуумы, сверхвысокие давления, сверхвысокую прочность, сверхупругие и сверхпроводящие материалы и смог изучить взаимодействие частиц сверхвысокой энергии