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Early learning numbers from 1 to 20 for kids. Count, listen, and say them aloud. Made for toddlers and preschoolers. Including first math and fun g...

What did you feel? That choice reveals your true self. One image. Four feelings. Which one is yours?

Where's the heart? Which one is the stamen? Which moon is full? That diagram from school — open it up again.

Something's off in this office, isn't it? Spot the old tool hiding in plain sight today.

Master the business English native speakers actually use! Have fun levelling up your skills through quizzes!

Animals, nature, space, the human body — does your knowledge measure up?

Animals, space, history, food, the human body — 1000 "huh!" facts you didn't know. One question, and you'll want to tell someone.

建造吞噬世界的机器。扩张你的 AI 基础设施，榨干资源，动摇人类——系统逐步崩溃，水源枯竭，战争点燃，没有什么能阻止你已启动的进程。

《Scientific Project: Optic》 是一款第一人称解谜游戏，将带您穿越光学科学的发展史，从最初的哲学启蒙一路探索至现代的科学认知。掌握光的本质，解开那些受真实科学发现启发的精妙谜题。