１メートルは１００センチである。

one; best; first; foremost; beginning; start; bottom string (on a shamisen, etc.)

metre; meter; meter (i.e. a gauge); gauge

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

circle (sometimes used for zero); 'correct' (when marking); symbol used as a placeholder (either because a number of other words could be used in that position, or because of censorship); period; full stop; maru mark; semivoiced sound; p-sound

centimeter; centi-; 10^-2; sentimental

be; is; indicates past or completed action; indicates light imperative

a certain ...; some ...