John had sometimes experienced this hankering at maths prep.约翰以前上数学预科班的时候会有这种渴望。
After prepping the boat, they sailed it down to Carloforte.备好船后,他们往下驶向了卡罗福泰。
The verb 'rely' takes the preposition 'on'.动词rely需要和介词on连用。