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- half lethal time 半致死时间
- Oral half lethal dose(LD 50) of thifensulfuron exceeds 5000mg/kg in rats, acute dermal toxicity(LD 50) exceeds 2000mg/kg, negative skin and mild eye irritation in rabbits, mild skin allergy in guinea pigs, with acute poisoning. 大鼠急性经口LD50 大于 5 0 0 0mg/kg ,经皮LD50 大于 2 0 0 0mg/kg。 家兔皮肤刺激试验阴性 ,轻度眼刺激性和弱致敏性。
- To Measure the Half Lethal Dose of Paraquat in Mice 百草枯半数致死量测定
- England were leading France15-0 at half time. 上半场英国队以十五比零领先法国队。
- Fruit juices ferment if they are kept a long time. 果汁若是放置很久，就会发酵。
- Time is sometimes called the fourth dimension. 时间有时被称为第四度空间。
- I think the work can be completed ahead of time. 我认为这项工作能提前完成。
- He will come on time even though it rains. 即使下雨，他还是会准时来的。
- Reading occupies most of my free time. 阅读占去了我大部分的闲暇时间。
- Our team was in the lead at half time. 我们队在前半场领先。
- The boy whizzed through the examination in half the time allowed. 那个男孩只用了规定时间的一半就迅速将试卷做完了。
- I apportioned half the property to each of them. 我把财产的一半分配给他们各人。
- Pot-holes can be lethal for the unwary cyclist. 路上的坑坑洼洼骑车的人一不小心就有致命危险。
- I need some time to orient my thinking. 我需要一些时间来使我的思想适应。
- She reckoned she had cut her cost by half. 她估计她减少了一半的费用。
- A transistorize radio takes no time to warm up. 晶体管收音机不需要预热时间。
- I worried half the night and have a fitful sleep. 我半个晚上都一直在担心，故而时醒时睡。
- At that time he had two helpers. 当时他有两个助手。
- I'm sorry to obtrude on you at such a time. 我很抱歉在这个时候打扰你。
- He can fling off a poem in half an hour. 他可以在半小时之内草就一首诗。
