We are very grateful to our translators:

Chinese: V. Laperdina, Чжан Синьжань, Мао Синьин
English: A. Hoft, T. Chichagova, N. Yakimenko, I. Ptitsyn
Finnish: M. Hokkanen
Italian: S. Griessmair, C. Lavore; E. Lunetta (VDNKh, Tsoi)
French: O. Karpeko, M. Boulvais, V. Thöni
German: M. Peker, D. Peker
Japanese: E. Nazarova, K. Yoshida, D. Moriya
Polish: M. Małek
Portugese: Маrina Canofre dos Santos
Spanish: J. Estrella Galindo, T. Urra
Serbian: Z. Begovic
Slovak: A. Ramazanov
Tajik: S. Muruvvatova
Thai: N. Mekratanakulpat
Turkish: A. Moskalenko
Vietnamese: Nhi Bé, Hà Nguyễn

Also …

Photos in Grammar section from Unsplash:
by Matthew Foulds - sad puppy;
by Etienne Girardet - hot weather;
by Robert Norton - sad boy;
by Valentin B. Kremer - freezing_dog;
by Alicia Steels - fun_in_louvre;
by Jon Tyson - empty_hall;
by Mick Haupt - empty_shop;
by Bermix Studio - caviar;

photo of glass in metal holder: shutterstock_385175299