public speaking 和public speech的区别

speech的意思是演说、演讲、
讲话，通常指在公共场合为群众所作的讲话，强调影响、教育或娱乐群众。
例句：
Intoxication
interferes
with
speech
and
coordination.
醉酒会影响言语能力和协调性。
His
speech
became
increasingly
thick
and
nasal
他说话的声音变得越来越粗，鼻音越来越重。
He
could
imitate
in
speech
or
writing
most
of
those
he
admired.
他能模仿大多数自己崇拜的偶像的讲话和写作风格。
speaking的意思着重讲话这一动作本身，既可指系统的长篇讲话，又可指简单的开口发音，但不一定有人在听所说的话。
例句：
Generally
speaking
there
was
no
resistance
to
the
idea
一般说来，没有人会反对这个观点。
His
work
schedule
still
includes
speaking
engagements
and
other
public
appearances.
他的工作日程表上还包括演讲安排和在其他公开场合的露面。
Politically
speaking,
do
you
think
that
these
moves
have
been
effective?