retentive
adj
1 (of the memory) having the ability to remember facts, impressions, etc (指记忆力)有记性的, 记忆力强的.
2 having the ability to hold or contain liquid, etc 能保持或容纳液体等的
retentive soil, ie that does not dry out quickly 能保持水分的土壤.
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