[완료]gentoo 관련 문서 중에 모르는 내용이 있어서요...

사전 찾아가면서 영어 공부겸 컴퓨터 공부 할려고 젠투 문서 보고 있는데...
잘 이해가 안되는 부분이 있어서요...
--ask옵션과 --deep가 뭐하는 옵션인가요...?
영어가 짧은지라...설명좀 부탁드립니다..

emerge --update --ask world
emerge --update --deep world

emerge --update world

참고로 man 페이지 영어 내용도 적어놨습니다..ㅠ_ㅠ 영어 공부 힘들어요~~

--ask (-a)
Before performing the action, display what will take place
(server info for --sync, --pretend output for merge, and so
forth), then ask whether to proceed with the action or abort.
Using --ask is more efficient than using --pretend and then exe-
cuting the same command without --pretend, as dependencies will
only need to be calculated once. WARNING: If the "Enter" key is
pressed at the prompt (with no other input), it is interpreted
as acceptance of the first choice. Note that the input buffer
is not cleared prior to the prompt, so an accidental press of
the "Enter" key at any time prior to the prompt will be inter-
preted as a choice!

--deep (-D)
This flag forces emerge to consider the entire dependency tree
of packages, instead of checking only the immediate dependencies
of the packages. As an example, this catches updates in
libraries that are not directly listed in the dependencies of a
package. Also see --with-bdeps for behavior with respect to
build time dependencies that are not strictly required.