language points

cast about for \ to do 搜索、设法寻找、试图找到、到处寻找 The dog is casting about for its supper. She cast about how she could avoid work. The teacher cast about for an easy way to explain the lesson. keep one's eyes on = fix ( one's eyes ) on \ upon stare at 凝视，盯着看 glare at 怒视··· turn away 走开、避开、转过脸、赶走 be (on a ) level with 与······齐平、和······处于同等高度