Shoebills very rarely raise more than one chick.鯨頭鸛一般一次只撫養一只雛鳥

more than超過；多于

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

這個城市人口超過一百萬。

I'll stay here not more than three days.

我將待在這里最多不超過三天。

The younger chick was only ever an insurance,in case the elder didn't make it.小點的雛鳥只是個備胎罷了以防大的不幸夭折

in case萬一，以防；如果

I have kept a reserve fund in case of accidents.

我已籌備了一筆準備基金以防不測。

They watched him closely in case he should escape.

他們嚴密監視他，惟恐他會逃脫。

they're better off putting all their efforts最好還是把所有精力

better off情況更好

He will be better off in hospital.

他住院留醫的話，病情定會好轉。

He'd be better off going to the police about it.

他最好把這件事報告警方。