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

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 специально разработанным механизмам и машинам. 5. человек получил сверхвысокие и сверхнизкие температуры, сверхвысокие вакуумы, сверхвысокие давления, сверхвысокую прочность, и сверхпроводящие материалы и смог изучить взаимодействие частиц сверхвысокой энергии

Next vacations i am going to spend with my family. my dad presented us a tour around the europe. he made a very detailed route. let me introduce you our plan. so, from our home we will go by bus to the airport. then, by plane we will fly to france and spend few days in paris, the city of love. we are going to walk on foot and look the most interesting sights.after few days there we will go to italy, it's around 80 km by car. there are a lot of beautiful places there so we won't feel boring. moreover, in europe it's very popular to move around the city by bicycles,  so i am sure that we will rent it  and drive somewhere, because my family likes active lifestyle.  at the end of our journey we are going to have a day-trip by ship to look the beautiful nature and enjoy  sunshine. after this trip we need to come back to the rome by train and take a flight home. i am waiting soon for this vacations and i am sure that everyone from our family will like it.