After studying differential calculus you will be able to solve these mathematical problems.学了微积分之后,你们就能够解这些数学题了.I’m specializing in differential and integral calculus.我正专攻微分学和积分学。All this leads up to the most fundamental...
More familiar landscapes have been sculpted by surface erosion.还有更多熟悉的地貌是因地表侵蚀形成的。This leaves fertile soil unprotected and prone to erosion.这会让肥沃的土壤暴露在外，使其容易受到侵蚀。Crop rotation helps prevent soil erosion.农作物轮作有助于防止水土流失....
A tsar was a living icon, invested with deep historical and religious significance.沙皇曾是活着的圣像,具有深远的历史和宗教意义。The tsar was just a paper tiger.沙皇不过是一只纸老虎.He assumed full authority as tsar in 1689.1689年他全面掌权做了沙皇。The tsar prote...