3. Guess the word by the explanation of its meaning. 1) a device used in navigation that keeps steady because of a heavy wheel spinning inside it; 2) a period of hundred years.

Перевод задания: Угадайте слово по объяснению его значения.

1. A device used in navigation that keeps steady because of a heavy wheel spinning inside it — гироскоп. Слово: gyroscope (гироскоп).
2. A period of hundred years — век. Слово: century (век).