Someone who is easy to understand or transparent.
человек, которого легко понять или который прозрачен (chelovek, kotorogo legko ponyat' ili kotoryy prozrachen)
"She’s an open book; you always know what she’s thinking."
"Она опен бук; ты всегда знаешь, что она думает." (Ona **open book**; ty vsegda znaesh', chto ona dumayet.)
to decline suddenly and dramatically
using creative and low-cost strategies to rapidly grow a bus...
in a state of great happiness
AI's ability to simulate or mimic human emotions
to die (humorous or informal)
very eager or excited to start something
