2 sentences

1. 每天阅读是他雷打不动的功课。

   měi tiān yuè​dú shì tā léi​dǎ​bù​dòng de gōng​kè.

   Reading every day is a routine he never breaks.

   Source: Dong Chinese Dictionary

2. 他是个老瘾君子，每天雷打不动要抽两包烟。

   tā shì gè lǎo yǐn​jūn​zǐ, měi tiān léi​dǎ​bù​dòng yào chōu liǎng bāo yān.

   He's a long-time smoker who smokes two packs a day without fail.

   Source: Dong Chinese Dictionary