Something added to another thing, but not a necessary part of it (to; of).

附加(而非必要之)物；附属物。

A qualifying word; modifier.

【文法】修饰语；附属词。

An associate or assistant of another.

助理。

Added or connected in a subordinate or auxiliary capacity.

附属的。

Attached to a faculty or staff in a temporary or auxiliary capacity.

助理的。