[化] 阴极斑点

VOA慢速英语2013 Agriculture Report - Getting a Firm Grip on Weed Control

Agriculture Report - Getting a Firm Grip on Weed Control 农业报道 - 控制杂草生长的办法 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 When is a plant considered a weed? Experts at Pen

发表于:2018-12-07 / 阅读(130) / 评论(0)

2013年VOA慢速英语(一)月

VOA慢速英语2013 Getting a Firm Grip on Weed Control

Getting a Firm Grip on Weed Control This is the VOA Special English Agriculture Report. When is a plant considered a weed? Experts at Penn State University have a simple answer: When the undesirable qualities outweigh the good qualities. Consider the

发表于:2019-01-12 / 阅读(71) / 评论(0)

2013年VOA慢速英语(五)月

VOA慢速英语2011--Inventor of Weed Eater Started a Revolut

Agriculture Report - Inventor of Weed Eater Started a Revolution 农业报道 - 巴拉斯开启割草机革命 This is the VOA Special English Agriculture Report. 这里是美国之音慢速英语农业报道。 George Ballas of Houston, Texas, lived

发表于:2019-01-12 / 阅读(63) / 评论(0)

2011年VOA慢速英语(七)月

美国国家公共电台 NPR Damage From Wayward Weedkiller Keeps Growing

RACHEL MARTIN, HOST: Farmers in parts of the South are fighting each other over a weed-killing chemical. Some are using it in combination with a new generation of genetically engineered crops. Others are angry because it's blowing in the wind and dam

发表于:2019-01-16 / 阅读(51) / 评论(0)

2017年NPR美国国家公共电台7月

The Casket and the Pearl

A man from the state of Chu wanted to sell a precious pearl in the state of Zheng．He made a casket for the pearl out of the wood from a magnolia tree，which he fumigated with fragrant osmanthus and spices．He studded the casket with pearls and ja

发表于:2019-01-26 / 阅读(102) / 评论(0)

趣味英语

The Water Sprite and the Pearl

A man was sailing in a small boat，and dropped a precious pearl into the sea accidentally．When the man had returned to land，he took a pail，and began to scoop up the water and pour it on the shore．For three days he scooped and poured unwearie

发表于:2019-01-26 / 阅读(58) / 评论(0)

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acetome powder

Agkistrodon piscivorus

Akawaio

algebra of propositions