a coloured line, especially one that is not straight or has been made accidentally

色条; 条痕; 斑纹:

Sue has blonde streaks in her hair.

休的头发里夹杂着几缕金发。

a part of someone's character that is different from the rest of their character

个性特征，特点:

a mean streak

吝啬的个性

His serious nature was lightened by a streak of mischief.

他严肃的个性中带着一丝顽皮。

a period of time during which you continue to be successful or to fail

〔不断成功或失败的〕一段时期:

Celtic are on a six-game winning streak.

凯尔特人队六连胜。

streak of lightning / fire / light etc, a long straight flash of LIGHTNING , fire etc

一道闪电/火光/光亮等

[I always + adv / prep] to run or fly somewhere so fast you can hardly be seen

飞速地跑（飞）:

Two jets streaked across the sky.

两架喷气式飞机在空中一闪而过。

[T usually passive] to cover something with lines of colour, liquid etc

使布满条纹（条痕）:

The sky was streaked yellow and purple.

天空布满黄色和紫色的条纹。

His hands and arms were streaked with paint.

他的手和胳膊上全是一道道的漆印。

[I] to run across a public place with no clothes on as a joke or in order to shock people

裸奔