by all means无论如何,必定
by means of… 借助于…,用…
by no means决不
by mistake错误地
in nature本质上
on occasion 有时,不时
in particular特别地,尤其,详细地
in the first place起初,首先
in the last place最后
in practice 实际上
at present目前,现在
in proportion to… 与…成比例
for (the) purpose of… 为了…
on purpose故意,有意
at random 随意地,任意地
at any rate无论如何,至少
by reason of… 由于…
with/in regard to… 对于…,就…而论
with respect to… 关于…
as a result结果,因此
as a result of… 由于…的缘故