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Emergency contraception can prevent pregnancy after unprotected sex .

紧急避孕药可以在无保护措施的性生活后防止意外受孕。

The protected cells survived , while unprotected tumor cells died .

正常细胞得到保护而仍存活，肿瘤细胞则不受保护而死亡。

You can get an std any time you have unprotected sex .

在任何无防护措施的性行为中你都有可能感染性病。

There was no suggested that mr ryan engaged in unprotected sex or had a sexually transmitted infection .

而丝毫看不出瑞恩有过不安全的性行为或染上性传播疾病。

You may contract a sexually transmitted infection if you have unprotected sex .

如果你发生不设防性行为，那么你可能接触到一种性传播传染病。