译文及注释：
疆理虽重海，车书本一家。盛勋归旧国，佳句在中华。
疆理(jiāng lǐ) - 疆 refers to border or territory 理 refers to management or administration. Together it means the management of the border or territory.
虽(suī) - although
重海(chóng hǎi) - heavy sea metaphorically referring to the challenges and difficulties.
车书(chē shū) - carriage and books metaphorically referring to the knowledge and skills.
本(běn) - originally inherently
一家(yī jiā) - one family metaphorically referring to the same origin or source.
盛勋归旧国，佳句在中华。
盛勋(shèng xūn) - a person's name
归旧国(guī jiù guó) - return to the old country metaphorically referring to returning to one's homeland.
佳句(jiā jù) - excellent sentences or phrases
在(zài) - exist located in
中华(zhōng huá) - refers to the central plains region the cultural and political center of ancient China.
定界分秋涨，开帆到曙霞。
定界(dìng jiè) - set boundaries or limits
分秋涨(fēn qiū zhǎng) - divide the autumn flood metaphorically referring to making a clear distinction or decision.
开帆(kāi fān) - set sail metaphorically referring to embarking on a journey or endeavor.
到(dào) - to towards
曙霞(shǔ xiá) - the glow of dawn metaphorically referring to a new beginning or hope.
九门风月好，回首是天涯。
九门(jiǔ mén) - nine gates metaphorically referring to various opportunities or paths.
风月(fēng yuè) - wind and moon metaphorically referring to beautiful scenery or romantic experiences.
好(hǎo) - good enjoyable
回首(huí shǒu) - look back metaphorically referring to reflecting on the past.
是(shì) - is
天涯(tiān yá) - the end of the world metaphorically referring to a distant place or faraway land.