Chalkography
金相学
🗣️ 情景例句
Ask-Bob-to sit-behind-me.
让鲍伯坐在我后面。
The proof of the pudding is in the eating.
空谈不如实验。（实践出真知）
These alone took sixteen months to build.
仅这两座塔就花了16个月才建成。