. "\uC0AC\uB2E4\uB9AC \uC5F0\uC0B0\uC790(\uC601\uC5B4: ladder operator)\uB294 \uC5B4\uB5A4 \uC5F0\uC0B0\uC790\uC758 \uD55C \uACE0\uC720\uBCA1\uD130\uB97C \uB2E4\uB978 \uACE0\uC720\uBCA1\uD130\uB85C \uBC14\uAFB8\uB294 \uC5F0\uC0B0\uC790\uB2E4. \uACE0\uC720\uAC12\uC744 \uC99D\uAC00\uC2DC\uD0A4\uB294 \uC62C\uB9BC \uC5F0\uC0B0\uC790(\uC601\uC5B4: raising operator)\uC640 \uAC10\uC18C\uC2DC\uD0A4\uB294 \uB0B4\uB9BC \uC5F0\uC0B0\uC790(\uC601\uC5B4: lowering operator)\uAC00 \uC788\uB2E4. \uC774\uB97C \uC368\uC11C \uC8FC\uC5B4\uC9C4 \uC5F0\uC0B0\uC790\uC758 \uD55C \uACE0\uC720\uBCA1\uD130\uB85C\uBD80\uD130 \uB2E4\uB978 \uBAA8\uB4E0 \uACE0\uC720\uBCA1\uD130\uB97C \uCC3E\uB294\uB2E4. \uC591\uC790\uC5ED\uD559\uC5D0\uC11C \uB110\uB9AC \uC4F0\uC778\uB2E4."@ko . . "\uC0AC\uB2E4\uB9AC \uC5F0\uC0B0\uC790(\uC601\uC5B4: ladder operator)\uB294 \uC5B4\uB5A4 \uC5F0\uC0B0\uC790\uC758 \uD55C \uACE0\uC720\uBCA1\uD130\uB97C \uB2E4\uB978 \uACE0\uC720\uBCA1\uD130\uB85C \uBC14\uAFB8\uB294 \uC5F0\uC0B0\uC790\uB2E4. \uACE0\uC720\uAC12\uC744 \uC99D\uAC00\uC2DC\uD0A4\uB294 \uC62C\uB9BC \uC5F0\uC0B0\uC790(\uC601\uC5B4: raising operator)\uC640 \uAC10\uC18C\uC2DC\uD0A4\uB294 \uB0B4\uB9BC \uC5F0\uC0B0\uC790(\uC601\uC5B4: lowering operator)\uAC00 \uC788\uB2E4. \uC774\uB97C \uC368\uC11C \uC8FC\uC5B4\uC9C4 \uC5F0\uC0B0\uC790\uC758 \uD55C \uACE0\uC720\uBCA1\uD130\uB85C\uBD80\uD130 \uB2E4\uB978 \uBAA8\uB4E0 \uACE0\uC720\uBCA1\uD130\uB97C \uCC3E\uB294\uB2E4. \uC591\uC790\uC5ED\uD559\uC5D0\uC11C \uB110\uB9AC \uC4F0\uC778\uB2E4."@ko . "\uC0AC\uB2E4\uB9AC \uC5F0\uC0B0\uC790"@ko .