Few textbooks on animals discuss the possibility of love .

仅有很少的动物教科书探讨爱情的存在可能。

Mr. thach says most schools have enough textbooks .

thach先生表示，大多数学校都有足够的课本。

Should I mark in my textbooks ?

我应该在书本上做记号吗？

Textbooks would say that consolidation is the answer .

理论上讲，答案在于行业整合。

Most popular textbooks have a digital version and they 're available online .

大多数普通教材都有电子版本，并且都可以在线获得。