derris

/ˈdɛrɪs/ /ˈdɛrəs/

Meanings

noun

鱼藤

A climbing leguminous plant of Southeast Asia and the southwest Pacific Islands, Derris elliptica, whose roots are a source of rotenone.

Examples :

"The farmer cultivated derris along the fence line, hoping to harvest its roots for use as a natural insecticide. "

这位农民在篱笆边种植了鱼藤，希望收获它的根来用作天然杀虫剂。

Related Words

islands noun

/ˈaɪləndz/

岛屿，岛。

"We took a boat trip to visit some small islands off the coast. "

我们乘船去海岸附近参观了一些小岛。

harvest noun

/ˈhaːvəst/ /ˈhɑː(ɹ)vəst/ /ˈhɑɹ.vəst/

秋收, 收获季节

"Harvest is usually very damp and rainy."

秋收时节通常非常潮湿多雨。

southwest

/saʊˈwɛst/

西南

"The hiking trail heads southwest, away from the town. "

这条徒步路线朝西南方向延伸，逐渐远离城镇。

cultivated verb

/ˈkʌltɪveɪtɪd/

种植，耕种

"Most farmers in this region cultivate maize."

这个区域的大部分农民都种植玉米。

source noun

/sɔːs/ /sɔɹs/

来源，出处。

"The accused refused to reveal the source of the illegal drugs she was selling."

被告拒绝透露她所贩卖的非法毒品的来源。

natural noun

/ˈnætʃəɹəl/ /-ɚəl/

本地人，居民。

"The new student was a natural from Japan. "

这个新学生是土生土长的日本人。

insecticide noun

/ɪnˈsɛktɪˌsaɪd/

杀虫剂，灭虫药

"The farmer used insecticide to kill the bugs eating his crops. "

农民用了杀虫剂来杀死吃他庄稼的虫子。

southeast

/ˌsaʊθˈiːst/ /ˌsʌʊθˈiːst/

东南

"The school picnic is located in the southeast corner of the park. "

学校野餐地点在公园的东南角。

pacific adjective

/pəˈsɪfɪk/

平静的, 祥和的

"The teacher's calm and pacific demeanor helped the students relax during the stressful exam. "

老师平静祥和的态度帮助学生们在紧张的考试中放松下来。

rotenone noun

/ˈroʊtəˌnoʊn/ /ˈroʊtənoʊn/

鱼藤酮，鱼藤精。

"The gardener sprayed the roses with rotenone to kill the aphids. "

园丁在玫瑰花上喷洒了鱼藤酮，用来杀死蚜虫。

leguminous adjective

/ləˈɡjuːmənəs/ /lɛˈɡjuːmənəs/

豆科的

"The farmer planted leguminous crops like soybeans to improve the soil's nitrogen content. "

为了提高土壤的含氮量，这位农民种植了豆科作物，比如大豆。

climbing verb

/ˈklaɪ̯mɪŋ/

攀登，爬升

"Prices climbed steeply."

价格大幅攀升。