轻型的英文：
light; light-duty

参考例句：

Light rowing-boat for racing
(轻型的)赛艇.

The new-type motorBicycle (moped), light and high-speed, runs swiftly like the wind and helps you to gain success.
轻型助动车，轻巧快速，风驰电掣，助您成功。

Recently they had learned to cast light concrete boats.
最近他们已学会了浇铸轻型水泥船。

Light Duty Rack
轻型货架

the power rating of a light fixture.
轻型装置器的额定功率

A light motorized vehicle.
一种轻型机动车.

She bought a light truck.
她买了一辆轻型卡车。

She bought a light truck.
她买了一辆轻型卡车。

the midair collision of two light planes
两架轻型飞机在空中的碰撞

The undercarriage on light aircraft does not always retract in flight.
轻型飞机飞行时起落架不一定缩回。

light是什么意思：
n. 光；光源；灯；点火物；日光；角度，眼光
v. 点，点燃；点着；照亮；用灯光指引
adv. 轻的，轻装的
adj. 浅色的；轻的；少量的；轻微的；（负担）轻的；轻盈的，轻快的；清淡的

The torch was lighted.
火炬点亮了。

I'm lost as a light is lost in light.
我如同灯盏迷失在光明里。

The saturation and lightness of light also affect our perceptions.
饱和度和亮度也影响到我们的感觉。

Ambient light: As the name suggests, this light is present everywhere.
环境光：就如其名所暗示，各处都存在光照。

The chamber was ablaze with light.
会议厅里灯火辉煌。

duty是什么意思：
n. 责任；义务；职责；职务；税

duty to rear; duty to provide support
抚养义务

a truck; a heavy duty truck
载重汽车

The path of duty is the path of safety
尽职的路是安全的路

They never neglect their duties.
他们从未玩忽职守。

You ought to do your duty.
你应该尽到自己的责任。