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次第， しだい
1. depending on
2. as soon as, immediately after, upon
3. as (e.g. "as one is told", "as one wishes"), whatever (e.g. "whatever is at hand")
4. order, program, programme, precedence
5. circumstances, course of events, state of things
6. reason
依赖；马上，随后；顺序，程序，计划，优先级
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到着次第， とうちゃくしだい
1. upon arrival of an item (items), as soon as one arrives
到达后(马上)
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第一， 第１， だいいち
1. first, foremost, number one
2. most important
3. best, greatest, most
4. above all, besides, in any case, to begin with
第一，首要，第一位；最重要的；最，最伟大的，最多的；首先，此外，无论如何，首先