Although people enjoyed reading his book，many of them thought that Marco's stories about China were too fantastic to be true.
雖然人們愛讀馬可的書，但許多人認(rèn)為他書中關(guān)于中國的描述太離奇而不可信。
Bacteria are

too small to be seen

too small to be seen

by the naked eye.
細(xì)菌太小，肉眼是看不見的。