只有

only; solely; just; merely; alone; but; barely; if; nothing other than; you cannot not but; only if

知道

know; tell; see; ken; be aware of; realize; understand; discern; be conscious of; let into; wise up; put wise to; aware; conscious; cognizant; knowledge; awareness; cognizance

世界

world; globe; earth; universe; creation; worldwide; internationally; geo-