保 管 bǎo guǎn : take care of; certainly; surely

筆 記 bǐ jì : take down (in writing); notes; a type of literature consisting mainly of short sketches

必 bì : certainly; must; will; necessarily

Big5: , Unicode: 5fc5 (必),
Links: MT, Cantonese, Ld, Chinese Language

當 然 dāng rán : only natural; as it should be; certainly; of course; without doubt

一 定 yī dìng : surely; certainly; necessarily; fixed; a certain (extent, etc.); given; particular