breakthrough
noun
ˈbreɪkθruː
noun
1
an
important
new
discovery
in
something
you
are
studying,
especially
one
made
after
trying
for
a
long
time
突破; 重大进展
[+
in
]
Scientists
have
made
a
major
breakthrough
in
the
treatment
of
cancer.
科学家在癌症治疗方面取得了重大突破。