Very old or ancient
非常に古いまたは古代の
"That legend is as old as the hills."
"その伝説は丘と同じくらい古いです。"
a technique used in AI to predict future trends based on his...
to continue working even when you are tired or out of energy
to improve oneself by understanding and correcting errors
to bend your body forward or downward
a big and sudden improvement
to be completely focused or revolve around something
