| 钻研 | zuan1 yan2 | to delve into |
| 追问 | zhui1 wen4 | to keep asking |
| 研读 | yan2 du2 | to read up |
| 钻 | zuan1 zuan4 | to probe |
| 强烈地 | qiang2 lie4 di5 | intensively |
| 饱览 | bao3 lan3 | to look intensively |
| 饱读 | bao3 du2 | to read intensively |
| 集中地 | ji2 zhong1 di5 | intensively |
| 精研 | jing1 yan2 | to study intensively |
| 钻坚仰高 | zuan4 jian1 yang3 gao1 | meticulous and diligent study |