lay plans/a trap etcPLANto carefully prepare all the details of something 制订计划/设圈套等 We are laying plans now in order to be successful in the future. 我们现在作好打算，为的是将来取得成功。
the best-laid plans (=plans that have been made carefully) 安排周密的计划，最好的打算 Bad weather can upset even the best-laid travel plans. 天气不好，再好的旅行计划也会被打乱。
lay plans/a trap etc• And the speaker may be totally unaware of laying a trap.• Clare wouldn't put it past Sam to use a rat to lay a trap for her.
→ lay plans/a trap etc at lay2(8)