Antithyroid drugs may influence the efficacy of 131i, the possible mechanism might be that antithyroid drugs change the effective half-time and (or) uptake of 131i.

抗甲状腺药物影响131i疗效的机理可能在于改变了131i的有效半衰期和(或)甲状腺对131i的摄取率。

youdao

Close to half (48%) of pregnant women in need receive effective medicines to prevent mother-to-child transmission of HIV (PMTCT) in 2010.

2010年，近一半(48%)有需要的孕妇收到了预防艾滋病毒母婴传播的有效药物(预防母婴传播)。

youdao

Although the most effective treatment involves a combination of drugs taken over a long period, even a single dose of treatment can cut the transmission rate by half.

虽然最有效的治疗方法是长期使用联合药物，但单剂量的治疗也能减少一半的感染几率。

youdao

So far it has proven effective at preventing the disease in half of those vaccinated which is more than ever before.

VOA: special.2009.12.07

The vaccine has already proven effective at preventing the disease in half of those vaccinated which is more than ever before.

VOA: special.2009.12.22

But recent findings suggested that tPA may be effective in saving brain tissue even if three to four and a half hours have passed.

VOA: special.2009.09.22

And researchers and Wall Street analysts have had another reason for viewing it as an also-ran: It is only half as effective as torcetrapib, boosting HDL by only 30%.

FORBES: Pfizer's Next Problem

But one of the most effective workouts takes less than half an hour.

FORBES: Shed Those Final 10 Pounds By Labor Day

Fly-half Arlidge was highly effective with kicks out of hand, but had an off-day in front of the posts, failing with his conversion attempt of Fussell's try.

BBC: Newport Gwent Dragons 8-26 Biarritz Olympique