it was over 30 feet in length.
直译它的长度超过30英尺.
通常在强调‘长度’时,用上面的表达形式.
例如:
我没意识到它的长度超过了30英尺.
I didn't realize that it was over 30 feet long.
上周六我捉了条大鱼,想知道它多大吗? 它的长度超过了30英尺.
I caught a big fish last Saturday. Do you want to know how big it was?
It was over 30 feet in length.
不过,更常用的是over 30 feet long.