make clear beforehand; 有言在先
strive to be the first and fear to lag behind; 争先恐后
ancestor forefather
my late father 先父
Why didn't you tell me before? 你先怎么不告诉我?
Xian Zhen 先轸
牛津高阶第八版
美国韦氏词典
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维基百科 (自由的百科全书)