Kennedy left a lasting impression on the people who heard his inaugural address.肯尼迪给那些听过他就职演说的人们留下了不可磨灭的印象。

launch vt.发动；发射，（使）升空

When he was stopped, the old man launched a verbal attack at the policeman.那个老人被拦住以后，便开始对警察破口大骂。

The satellite was launched into orbit.卫星被发射到运行轨道。

laundry n.洗衣店；待洗的衣服；层，层次；阶层

I placed the clean laundry on the table and started folding it.我把千净衣服放到桌子上，然后开始叠衣服。

There was a thin layer of oil on the surface of the water.在水面上有薄薄的一层油。

layout n.布局；设计

This map shows the layout of the camp.这张地图展示了营地的布局。

lea n./vi.跳跃

The dog leapt over the fence.那条狗跳过了栅栏。

lease n.租约；vt.出租，租借

1 signed a lease to rent a truck for a week.我签了一份租约，租一辆卡车一星期。

We havean leased an apartment for one year.我们出租广一套公寓，租期为一年。

legal adj.法律的；法定的，合法的

It's legal to turn right at a red light in most states.在大多数州，红灯时向右转是合法的。

legislation n.①立法②法规

Congress has the power of legislation.国会拥有立法权。

The government mandates that the states are to comply with federal legislation.政府规定，各州应遵守联邦法律。

liable adj.①有责任的，有义务的②易…的，有…倾向的

The Postal Service is not liable for damage to a parcel.邮政部门对包裹的损坏不承担责任。

That glass is liable to break.那种玻璃很容易打碎。