to begin with/首先;第一点(理由);
beginning n. 开始，起点;开端部分，开头部分
at the beginning/从一开始
at the beginning of/在……初
from beginning to end [from first to last]/从头到尾，自始自终
in the beginning/当初，开始时
on behalf of/代表;为了
on sb.’s behalf/以某人的名义;为了某人;代表某人;
behavior n. 举止;行为;
behind prep. 在……后面;向……后面;
a human being/人
for the time being/暂时;目前;
belief (pl. beliefs) n. (宗教)信仰;信心;