1 . profound
He has a profound knowledge of mathematics ., 他数学知识渊博.
2 . deep
“渊”的含义 ... 人或物聚集的处所 [haunt] 深;深远;渊博[deep;profound] 深:~博。~源。~浩。~玄。~邈。~儒。~识(精深的见识)。(王朝网络 wangchao.net.cn).
3 . bebroadandprofound
“淹”字查询_常宁字典网_新华字典 ... 〖bebroadandprofound〗渊博;广博 〖basinirrigation〗在田里蓄水供作物的根部吸收 〖stoyforalongtime〗长期逗留;羁留.