well
well down是什么意思？
down是什么意思？
well down 词组 做得好。（牛排等的熟度）全熟的。
单独的一个词down有“失望，失落”的意思，well作副词，表示程度，意思是：“很，很好地”
Well down, you have given me a bully suggestion.
做得好！你给了一个很不错的建议。
The crops are doing well down our way.
我们这一带的作物长势良好。
Teacher:Well down every one. OK! Now sit down first please.
老师:每一个都说得很好。好，现在请大家先坐下来。
ON是开启还是关闭？
向乐乐
on是开。1.ON是英语单词，通常代表开启；也是英语单词，通常代表关闭。通常在各类电器设备上，都是有on和off来代表电器设备的控制开关，也可以代表电源的接通与断开。 汽车on键是开启，按on键后该系统处在运行状态，相对应的
所有的介词？
英语一共有150多个介词。最常用的是这些：
aboard
about
above
across
after
against
along
amid
among
anti
around
as
at
before
behind
below
beneath
beside
besides
between
beyond
but
by
concerning
considering
despite
down
during
except
excepting
excluding
following
for
from
in
inside
into
like
minus
near
of
off
on
onto
opposite
outside
over
past
per
plus
regarding
round
save
since
than
through
to
toward
towards
under
underneath
unlike
until
up
upon
versus
via
with
within
without