单词：guard cell
guard cell的用法和样例：
例句
- Blue light may enhance guard cells to pump protons out of the cell.蓝光可促进保卫细胞将质子送出细胞。
- Two guard cells together encircle each stoma and control the opening and closing of the stomatal aperture.每个气孔由两个保卫细胞包围来控制气孔的开闭。
单词：guard cell 相关文章
The airport guard stopped the tall man. The man was trying to walk past the guard. The guard told him to use the entrance. You cannot enter here, he told the man. You can only exit here. The man nodded his head. He understood. He stood outside the se
简单慢速英语阅读
A guy I know was towing his boat home from a fishing trip to Lake Huron when his car broke down. He didn't have his cell phone with him, but he thought maybe he might be able to raise someone on his m
英文笑话
By Leta Hong Fincher Washington, D.C. 20 July 2007 Almost two years after Hurricane Katrina devastated the U.S. Gulf Coast, the National Guard says it remains ill-prepared to respond to a sudden disaster. Some lawmakers are calling for better plannin
2007年VOA标准英语（七月）
A guy I know was towing his boat home from a fishing trip to Lake Huron when his car broke down. He didn't have his cell phone with him, but he thought maybe he might be able to raise someone on his marine radio to call for roadside assistance. He cl
英语笑话（MP3+文本）
今天我们要学的词是off-guard。 Off-guard, 是没有提防，缺乏警惕的意思。以色列炮轰加沙后，联合国在加沙地区的一位高级官员说， We were caught off-guard by the operation, 这次行动让我们丝毫没有防备
英语单词荟萃
Topics: Alcatraz; The Simpsons; using negation with an infinitive; heaven versus heavens; kind of versus sort of versus type of Words: to escape guard jailbreak cover-up cell haunted animated dysfunctional family trouble-maker pacifier merchandise le
美语听力 English Cafe