Lacks confidence and poise is nervous and ill at ease.
信心不足,不够自信,精神紧张,心神不定。
All truths are not to be told.
真理并不都能说得清。
OK, everyone. Less noise, please! Gather round and listen carefully. First we are going to search the beach and the rock pools. Let me remind you what we are looking for: seaweeds, fish, plants, all living things. When you find anything, make a note where