（打结; 扣） tie; fasten; do up; button up:

• 把晾衣服绳系在树上

  fasten a clothesline between two trees;

• 把衣服扣子系上

  button up a jacket;

• 系围裙

  wear an apron;

• 系鞋带

  tie shoe laces

（系统） system; series:

• 芳香系

  aromatic series;

• 派系

  faction;

• 太阳系

  the solar system;

• 语系

  (language) family

（高等学校中按学科所分的教学行政单位） department; faculty:

• 社会学系

  the department of sociology;

• 物理[文学]系

  the physics [literature] department;

• 系主任

  head of the department; dean

（姓氏） a surname:

• 系益

  Xi Yi

（联结; 联系） relate to; bear on; depend on:

• 维系

  hold together; maintain;

• 成败系于此举

  stand or fall by this;

• 名誉所系

  have a direct bearing on one's reputation

（牵挂）feel anxious; be concerned:

• 系恋

  miss sb. very much;

• 系念

  feel concerned about

（拴; 绑） tie; fasten:

• 系马

  tether a horse;

• 系牢

  fasten up

[书] （是） be:

• 纯系试验性质

  be purely experimental in character;

• 其母系辽宁人。

  His mother is a native of Liaoning.

• 她讲的确系实情。

  What she said is the actual situation.