单词:cycle tyre bead ring flipper
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[00:02.90]Reading Page 64 and 65 [00:09.46]The Wonders of Dolphins [00:13.90]1.Here's a true story.In June 1990, Keith,Steve and Dave, three friends, [00:25.16]were fishing about 35 miles off the east coast of America when their boat sank [00:34.22]T
[00:11.62]Pages 43 and 44 [00:15.91]Talk about it! [00:18.60]Listen.Point. [00:22.18]a flashlight [00:28.47]a paper clip [00:34.06]a magnet [00:39.65]a thumbtack [00:45.17]January [00:50.36]February [00:55.56]March [01:00.97]April [01:05.85]May [01:1
Mike: So Dusty, your background is in Marine Biology. Is that right? Dusty: Yes. Mike: You're kind of a marine biologist. Dusty: Mm-hm. Mike: You've mentioned before yesterday, we're at the aquarium, you mentioned that you've done work with sea turtl
bead, [bi:d] n 珠子,水珠,准星 【例】She wore a string of beads 她挂了一串珠子。 有孔小珠; 念珠 水珠; 水泡 算盘; (枪的)准星 【建】凸圆线脚, 串珠线脚 【机】卷边; 车轮圆缘 焊珠, 焊蚕, 焊缝; 叠
Fire Cycle 火灾规律 The El Nino phenomenon of 1997-98 unleashed torrential rain in some parts of the world, while creating abnormally dry conditions in others. And it sparked record numbers of wildfires. Learn more about climate and wildfire -- toda
This is Scientific American's 60-Second Science, I am Cynthia Graber. This'll just take a minute. Whales and dolphins were molded by evolution to glide through water. Weve been trying to create streamlined designs ourselves for structures such as win