can't tell how many there are - there are numerous similar cases  不知凡几

Numerous classification  数量分类

Numerous collecting zooplankton  浮游动物

numerous in variety  品种多样

numerous tasks remain to be undertaken  百端待举

numerous types  数种

public place with numerous people  大庭广众

too numerous to mention individually or one by one  不胜枚举

Taro with numerous cormels  多子芋

Taro (Colocasia esculenta Schott.) with numerous corms  多子芋