天球模擬器 vs 英文開口說

Astronomy Teaching System is an interactive application designed for learning and exploring basic astronomy. Through visual simulations, it helps users intuitively understand complex celestial geometry and the patterns of celestial motion. Core Features: • Celestial Sphere and Diurnal Motion Simulation: Observe the celestial coordinate system with support for toggling Right Ascension RA and Declination Dec grid lines. Users can freely adjust the observer's latitude 90°N to 90°S via a slider to see real-time changes in the starry sky and stellar tracks at different latitudes. • Dual Perspectives and Relative Motion: Provides Earth Rotation and Celestial Rotation modes, allowing you to thoroughly understand the principles of diurnal motion from different reference frames. You can tap stars on the screen to hide or show specific celestial bodies. • Solar Path through the Seasons: Explore the changing position of the sun on the ecliptic. Use an intuitive date slider 1/1 to 12/31 to observe changes in solar altitude angles and daylight tracks during the equinoxes and solstices. • Space and Earth Mode Toggle: In Space Mode, view Earth's orbital path and axial tilt in the solar system from a bird's-eye perspective. In Earth Mode, view the daily solar path in the local sky from an observer's first-person perspective. • Rotation and Revolution Control: Supports independent toggling of Earth's rotation and revolution, with an acceleration feature for quick demonstrations of long-term astronomical changes. This application offers intuitive touch-to-zoom and perspective adjustment features, making it an ideal supplementary learning tool for students, educators, and astronomy enthusiasts.

「英文開口說」— 把美國外交學院 (FSI) 的口說訓練法搬到手機。 每天 10 分鐘，跟著 AI 老師反覆練「替換、回應、句構搭建、轉換」四種題型，建立英文反射神經，不再「想很久才講得出來」。 【為什麼是這套方法？】 FSI（美國外交學院）訓練外交官的口說，靠的不是背文法書，是大量、短句、反覆的「開口」練習。我們把這套方法搬到手機，讓你通勤、午休都能練。 【依進度循序解鎖】 從基礎句型開始，每完成一堂自動解鎖下一堂；已完成的課程會顯示打勾徽章，隨時可以回去重練熟悉的句型。每完成一個訓練階段就立即保存進度，中途接電話或切換 App 也不會白練。 【核心特色】 ▸ AI 老師 TTS 念給你聽 ▸ 你開口跟著說，麥克風錄音比對 ▸ AI 語音辨識評估你的口說 ▸ AI 針對每題給改進建議 ▸ 4 種題型循序漸進，建立反射 ▸ 自選老師語速、口音與性別 【四種訓練題型】 • 替換 (Substitution)：把句子裡的元素換掉再講一次，練結構記憶。 • 回應 (Response)：聽到問題立刻回答，練即時反應。 • 句構搭建 (Buildup)：從短到長把句子搭起來，練複雜表達。 • 轉換 (Transformation)：把句子改成疑問、否定、時態變化，練文法直覺。 【為什麼選英文開口說？】 • 沒有文法測驗，全靠真正開口說 • 短句、密集、立即回饋 • 每天 10 分鐘也能進步 • AI 給的建議針對你這次的句子，不是制式回應 【需要權限】 • 麥克風：錄製你的口說，與範句比對