n. 终结者, 明暗界限

[计] 终结器

[化] 终止剂; 终止子

[ noun ]
someone who exterminates (especially someone whose occupation is the extermination of troublesome rodents and insects)
<noun.person>

Terminator \Ter"mi*na`tor\, n. [L., he who limits or sets
bounds.]
1. One who, or that which, terminates.

2. (Astron.) The dividing line between the illuminated and
the unilluminated part of the moon.