地道的英文：
tunnel
causeway
natural
idiomatic

参考例句：

A rank amateur
一个地道的业余者

and without ascending the stairs the guide conducted him by a subterraneous passage to another entrance
向导说，他不上楼梯，领着伯爵从一条地道走到另一间黑牢的门口。

She apologized with(a)bad grace.
她很勉强地道了歉.

He apologized unreservedly.
他爽快地道了歉。

That man's a real twister.
那人是一个地道的骗子。

A tunnel dug to intercept and destroy an enemy's mine.
对抗地道截断或破坏敌人坑道而挖的地道

The exit of the tunnel is concealed.
地道的出口开在隐秘的地方。

I wonder if it's a real diamond.
它可是地道的钻石呀

To dig a hole or tunnel for habitation or refuge.
为居住或躲藏而挖洞或地道。

He pocketed his pride, and said good morning in a polite manner.
他克制自尊心, 有礼貌地道了一声“早安”。

tunnel是什么意思：
n. 地下通道；洞穴
v. 挖掘隧道；打开通道

The engineers sank a tunnel into the ground.
工程师们在地下挖了个隧道。

The exit of the tunnel is concealed.
地道的出口开在隐秘的地方。

A tunnel was to be blasted through the mountains.
一条隧道要被炸开，穿山而过。

causeway是什么意思：
n. 堤道,铺道

Credit keeps the crown of the causeway.
守信誉的人不怕走在大街中央。

They went forward as briskly as they could on the uneven causeway
他们用尽可能快的速度，在高低不平的堤上继续前进。

A small troop was threading the causeway at a good pace.
一小队人马在堤道上急急地赶路。

natural是什么意思：
adj. 自然的；天然的；不做作的；天生的；原始的；有血缘关系的
n. 天然物；生就具有特定才能的人

natural | natural sign
白键|本位记号

The method is a natural.
这方法一定灵。

Is there necessity in nature?
自然界是否存在必然性？