Rhythm methods
[医] 安全期避孕法
🧩 词语组成解析
n. 方法, 方式；研究方法（method的复数）
🗣️ 情景例句
I should be finished packing by then.
到那时候我应该已经整理好行李了。
It doesn't seem like that.
似乎不象是那样。
Bison waste no longer fell on the ground to improve the soil, which as a result became less good for growing plants.
地上不再有野牛的粪便来改良土壤，结果对于植物生长土壤变得不够肥沃了。