Egg parasitoids of the genus Trichogramma are widely used in biological control against Lepidopterous pests.赤眼蜂属是生物防治中广泛用来防治鳞翅目害虫的一类重要天敌昆虫.Maria spent the weekend eradicating pests from her garden.玛莉亚整个周末都在花园除虫.Several k...
马克一声不响地给他们每人倒好饮料并端上来。Quietly Mark poured and served drinks for all of them.每人可购买的票的限额已经由四张降至两张。The quota of four tickets per person had been reduced to two.即使把价钱平摊成6份，每人也还是要花一大笔钱。Splitting the price six ways had still co...
Peter the Great which was found in the snow outside St Petersburg, have been.在圣·彼得堡郊外雪地里发现的一幅彼得大帝的肖像画, 被.In Petersburg, 30 patrolmen have died violently in the past five years.在彼得斯堡，过去5年中有30名巡警死于暴力事件。She also hosts a sho...
通常，绘画中暖色调为近感色，而冷色调为远感色。Generally, warm colours advance in painting and cold colours recede.如果孩子们在绘画中表现不出真实性,他们就会变得灰心丧气.Children can get frustrated when they are unable to achieve realism in their drawings.画家使他的绘画中的粗糙色调变得...