例句與造句

1. he had recovered from a slow start to the extent that he taught himself advanced calculus and geometry textbooks .
   他已從緩慢的開端發(fā)展到能依靠教科書自學(xué)高等微積分和幾何學(xué)。
2. but by the time he was fourteen years old, he had recovered from a slow start to the extent that he taught himself advanced calculus and geometry from textbooks
   但到14歲時，他從早期遲鈍中蘇醒過來，能自學(xué)教科書，掌握了高等微積分和幾何學(xué)。
3. It's difficult to find advanced calculus in a sentence. 用advanced calculus造句挺難的