It is easy to imagine or understand something without needing to be told explicitly.
不用说明就能想象得到。
宋·王楙《野客丛书》而郊以吟诗废务，上官差官以摄其职，分其半禄，酸寒之壮，可想而知。”
Given how much he studied, his good grades were quite predictable.
Learn the next connected idiom: 可想而知 (kě xiǎng ér zhī) → 知法犯法 (zhī fǎ fàn fǎ)
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