Trapped by an army of urchins,被一群紅海膽群困住

an army of 一大批, 一大群

At the concert, there was an army of bodyguards.

音樂會上有大批的保安。

An army of ants swarmed over the sand-hill.

一大群螞蟻在沙丘上爬動。

Pycnopodia has more than met its match,海星不僅僅遇到了克星

more than不僅僅

This city has a population of more than 1,000,000.

這個城市人口超過一百萬。

More than one person has been concerned in this.

不止一個人與這件事有牽連。

Starfish are able to quickly regrow a lost limb.海星失去的觸手很快就能再生

be able to能夠

As I had plenty of money I was able to help her.

我錢很寬裕，能幫助她。

I am able to pick you up on the short wave radio.

我能用短波收音機收聽到你的信號。

but in fact it's some of the smallest that can make the biggest impact.但有些最小的品種，其實具有最重大的影響力

in fact事實上；實際上

She is by no means poor: in fact, she's quite rich.

她可不窮，其實她很闊。

In fact we were innocent of the crime.

事實上，我們是無辜的。