against是什么意思音标:英 [əˈgenst]美 [əˈɡenst]

prep. 反对, 对着, 倚靠

prep. Abreast; opposite to; facing; towards; as, against the
mouth of a river; -- in this sense often preceded by over.
prep. From an opposite direction so as to strike or come in
contact with; in contact with; upon; as, hail beats against the roof.
prep. In opposition to, whether the opposition is of
sentiment or of action; on the other side; counter to; in contrariety
to; hence, adverse to; as, against reason; against law; to run a race
against time.
prep. By of before the time that; in preparation for; so as
to be ready for the time when.