私たちの汽車は長いトンネルを通りぬけた。

we; us

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

train (sometimes specifically a steam train)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

long (distance); long (time); lengthy

tunnel; fielding error

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

avenue; street; way; road; coming and going; street traffic; flow (of water, air, etc.); transmission (of sound); reach (e.g. of voice); fame; reputation; popularity; the same status or way; as (e.g. as expected, as I said); understanding; comprehension; counter for sets of things; counter for methods, ways, types

to come out; to fall out; to be omitted; to be missing; to escape; to come loose; to fade; to discolour; to wear a hole (e.g. clothes); to leave (e.g. a meeting); to be clear; to be transparent (e.g. of the sky); to be stupid; to be absentminded; to be careless; to be inattentive; to exit (a program loop)