x1 (vector) is the displacement of x2 (object/point) relative to x3 (object/point; contextless default: origin) in coordinate system/frame of reference/as measured by x4 according to definition/standard/(meta)physics x5
Echo-resumptive construction initiator: This particle immediately precedes a verb word (selbrivla) which is a repetition of a verb that already occurred in the same sentence in an outer clause level; the combination of this particle and that echo verb acts like a terminator, signaling a return to the closest clause level whose main verb was the same as the provided echo verb.
x1 is x2 (li; no default value assumed, but - unless explicitly overridden - assumed to be expressed with significant figures) years old according to standard of measurement x3; colloquial form: x1 is/has x2 (years (of age)).
x1 (experiencer/function) increases/gains/is incremented/augmented in property/quantity x2 such that it achieves/had achieved having that property at 'time' x3 (abstraction, number) according to standard x4