adv.第一；首先
Firstly, state sovereignty is inseparable. 第一，國家主權(quán)不可分割。
Firstly,China should have a development program for young fencers. 第一，中國應(yīng)有一項培養(yǎng)少年兒童擊劍運動員的發(fā)展計劃。
Firstly, let me tell you why he is a real father. 首先，讓我告訴你他為什么是一個真正的父親。
