棉线

cotton thread

丝线

silk thread

毛线

yarn

锦纶线

nylon thread

缠线

coil a thread

搓线

twist a thread

开线

come unstitched

线袜

thread socks

线乱了。

The thread is all tangled up.

线打结了。

The thread is knotted up.

直线

straight line

曲线

curve

虚线

dotted line

折线

broken line

斜线

diagonal line

平行线

parallel line

细线

narrow line

粗线

thick line

划一条线

draw a line

子午线

meridian

斜线本子

slant-ruled notebook

前线

front line

防线

defensive line

紫外线

ultraviolet ray

爱克斯射线

X-ray

航线

airline

铁路线

railway line

京沪线

Beijing-Shanghai railway

单行线

one-way street

选线

choose a route

沿线各地

all regions along the route

在死亡线上挣扎

struggle on the boundary between life and death

眼线

police informer

走内线

go through private channels