### 成员变量

类型: String

#### # static readonly feet

LinearUnits.feet，英尺

Default Value:
  - 'feet'

类型: String

#### # static readonly kilometers

LinearUnits.kilometers，千米

Default Value:
  - 'kilometers'

类型: String

#### # static readonly meters

LinearUnits.meters，米

Default Value:
  - 'meters'

类型: String

#### # static readonly miles

LinearUnits.miles，英里

Default Value:
  - 'miles'

类型: String

#### # static readonly nauticalMiles

LinearUnits.nauticalMiles，海里

Default Value:
  - 'nautical-miles'

类型: String

#### # static readonly yards

LinearUnits.yards，码

Default Value:
  - 'yards'