射線與線段

射線與線段的英文?

線段: line segment
射線: ray, half-line

X射線: X-ray

[ref] http://en.wikipedia.org/wiki/Line_(geometry)

髮剪

髮剪: hair clipper, hair trimmer, hair cutter, hair scissors
電動髮剪: electric hair trimmer

防水電動髮剪: water-proof electric hair clipper


[Q] How to cut your own hair?
[try] http://www.instructables.com/id/How-To-Cut-Your-Own-Hair/

手札 手稿 雜記

手札: a personal letter, a personal note
手稿: autograph, manuscript, draft

雜記: Random note, miscellany, miscellany, scattered note, dispersive note, disconnected note

jotting: a hurried brief note, a short hand-written note