It-lâi … , jī-lâi …

First of all …, and secondly …

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Chò gī-kang, it-lâi ē-tàng kòng-hiàn ka-tī ê le̍k-liōng, jī-lâi iā ē-tàng hō· ka-kī ê seng-o̍ah thé-giām iá koh khah hong-hù.

First of all, by doing volunteer work you can contribute your own physical ability, and secondly can also enrich your life experience.