Ex. 4. Make up sentences with the following words: (письменно) 1. a device, parts, that, means, any type of work, a machine, having, perform.
2. many elements, of, "machine", for instruments, is, the name, consisting, used.
3. rotating, mounted, a shaft, about its axis, in bearings, is.
4. is, a device, the direction, a simple machine, transforming, of a force.
Explanation: The word "device" refers to any kind of tool or equipment. "Means" suggests that the device is capable of performing some form of work. "Any type of work" indicates that the device can be used for various purposes. "Having parts" implies that the device consists of different components that work together to accomplish the desired task. Thus, this sentence conveys the idea that a device is capable of performing work when it has the necessary components.
2. The name "machine" is used for many elements consisting of instruments. (Название "машина" используется для множества элементов, состоящих из инструментов.)
Explanation: In this sentence, "the name 'machine'" refers to the word used to identify a broad range of items. "Many elements" indicates that there are multiple components or parts involved. "Consisting of instruments" suggests that these elements are made up of musical or scientific devices. Therefore, the sentence states that the term "machine" is used to describe a variety of items that are composed of instruments.
3. A shaft is mounted in bearings and rotates about its axis. (Вал устанавливается на подшипники и вращается вокруг своей оси.)
Explanation: "A shaft" refers to a long, cylindrical object. "Mounted in bearings" means that the shaft is securely placed within a support system, such as bearings. "Rotates about its axis" indicates that the shaft spins or turns around its central line. Thus, the sentence explains that a shaft is fixed within a support system and has the ability to rotate around its own axis.
4. A simple machine is a device for transforming the direction of a force. (Простое устройство - это устройство для изменения направления силы.)
Explanation: "A simple machine" refers to a basic tool or mechanism. "Transforming the direction of a force" suggests that this machine can alter the path or orientation of a force. The sentence implies that a simple machine is designed to change the way force is applied or directed.