I'm sorry you've had a wasted journey.

抱歉劳你白跑一趟。

A serial killer is on the loose!

有个连环杀手正逍遥法外！

Several small businesses consolidated to form a large powerful company.

几家小企业合并成了一家实力雄厚大型公司。

Viewed from the top of Mount Tai, the sunrise was indeed a spectacle.

从泰山顶看去，日出真是个奇观。

A tigon is a cross between a tiger and a lion.

虎狮是老虎和狮子交品。

A tiglon is a cross between a lion and a tiger.

虎狮是狮子和老虎杂交种。

A mule is a cross between a mare and a donkey.

骡子是雌马和驴杂交种。

A small room; a cubbyhole; a small secluded room; a small compartment.

有小房间，小隔间（橱），隐蔽小房间，意思。具体翻译要看下文而定。

An electron has a negative charge,a proton has a positive charge.

电子带负电荷,质子带正电荷。

A picture of a cat on a log is a rebus for catalog.

画中有一只猫(cat)站在一块木(a log), 底是catalog(目录)。

A dime is a tenth of a dollar.

一角银币是十分之一美元。

I'm a renegade, a turncoat, a Scalawag.

我是个叛徒，变节者，流氓。

The four-building complex will include a library, a museum, an auditorium and a planetarium.

由四栋房屋所构成这座综合建筑将包括一个图书馆、一个博物馆、一个礼堂及一个天文馆。

A chair consists of a seat with a back.

椅子是由椅座和椅背构成。

I was a nuisance, an incumbrance, and a pest.

我是一个讨厌东西，一个累赘，和一个祸害。

A tenant occupies a flat, a building, a farm, etc but does not own it.

* tenent （房客或佃户）占用公寓、建筑物、农场，但并非所有者。

When a catalytically active enzyme forms a complex with a cofactor a holoenzyme is produced.

酶蛋白和辅助因子两者结合成完整分子时，形成具有活力全酶。

If a state punishes a murderer by death it’s an eye for an eye.

如果政府以死刑惩处凶手,这是以牙还牙。

A coin has two sides,a head and a tail.

硬币有正反两面。

The statue has a gentleness,an ambience,a wistful elegance.

那尊雕像具有一种柔和、一种独特格调、一种忧郁沉思雅致。