safe period contraception 安全期避孕
safe period forecast 安全期预报
safe period for use 安全使用期
Safe period test 安全期测试
safe crop period 安全收割期 ; 安全施药间隔期
The Safe Period 安全期
safe period method 安全期法
safe falling period 安全下降周期
period safe falling 安全下降周期
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以上来源于: WordNet
N the period during the menstrual cycle when conception is considered least likely to occur 安全期 [非正式] → see also rhythm method
Dust storms very probably happen on hot summer days, and it's not safe for people to travel during this period.
沙尘暴很可能发生在炎热的夏天，在这个时期人们旅行是不安全的。
Throughout this period food became cheaper, safe and more reliable.
在此期间，食物变得更便宜、更安全、更可靠。
It is essential therefore that infants receive appropriate, adequate and safe complementary foods to ensure the right transition from the breastfeeding period to the full use of family foods.
因此，至关重要的是婴儿必须获得适当、足够和安全的补充食物以便确保正确地从母乳喂养阶段过渡到充分利用家庭食物。
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