lit. one man guarding the gateway, meaning one who is courageous and can fend off any troubles

(adj.) to be aware of everything happening at the moment; to be on alert, multitasking

off duty

China-United States relations; Sino-American relations

lit. if it's not my business, should not be on my mind, meaning never mind other's business

to take an interest in everything [written and colloquial]

relates to

(adv.) very, extremely or immensely, usually used behind an adjective or a verb, e.g. 錯得交關 extremely wrong; 靚仔得交關 extremely handsome.

inter-personal relationships

Cross-Strait relations, are the relations between mainland China and Taiwan

public relations

not related; no relationship between the matters concerned; nevermind

stuck at a level / checkpoint

critical moment

irrelevant; not related to

not related to…(something or someone); to be of no relevance

none of your concern, nothing that you need to know

Causality

National organizations

weir

main point

closely related

adj; not good or talented at anything, both military and civil field (art or martial art)

year-end

a situation which is so important that it concerns people's lives

extremely relevant

to play morra with everyone in a feast

to gain connections by bribery [colloquial]

front rollover (slang)

to guard or secure