to have confidence in your own abilities
相信自己 (xiāngxìn zìjǐ)
"Believe in yourself and you can achieve anything."
"相信自己,你就能实现任何事情。" (xiāngxìn zìjǐ, nǐ jiù néng shíxiàn rènhé shìqíng)
without any logical uncertainty
to examine a story or issue from every perspective
to be in a difficult or tricky situation
it is a waste not to use your mental abilities
so surprised that you cannot speak
to remove an item from a list