通过对林木害虫毒力测定结果表明：9种天然杀虫植物中白屈菜、兴安白芷、白头翁、兴安藜芦、白藓、走马芹粗提物杀虫效果较好。
The toxicity test indicated that of all 9 species of plant, the substances extracted from Chelidonium majus, Radix angelica dahurica , Pulsatillae Chinensis, Veratrum dah uricum Loes.
见见他的朋友齐爱芹，向大家展示一下不同价格的白珍珠和黑珍珠。
Meet his friend Alice, who shows a range of white and black pearls, and their respective prices.
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