1、开始
... fall through 失败，成为泡影，落空, fall to doing 着手(做)...;开始... fall to pieces崩溃,倒塌,解体 ...
2、着手
... fall through 失败，成为泡影，落空, fall to doing 着手(做)...;开始... fall to pieces崩溃,倒塌,解体 ...
3、开始攻击
...开始搏斗 come to grips with开始攻击 fall to doing开始有效 come into force ...