dú wán / nà běn / kē xué jiā / de / píng zhuàn / wǒ / cái / míng bai / tā de / fā xiàn / jīng lì / le / duō shao / cì / shī bài

读完那本科学家的评传，我才明白他的发现经历了多少次失败。

Only after reading that scientist's critical biography did I understand how many failures his discovery had involved.