Saturday/Week 15
从方框中选出合适的单词并用其适当形式填空。
create explore pollute environment
kilogram this it long deep reach
Chinese scientists have developed a lightweight
underwater robot to explore the Mariana Trench,
the 1 part of the oceans. Weighing just 2.7

2 and 50 cm long, this robot was designed by Beihang University
researchers led by Professor Wen Li. Their work, reported in a top
science journal in March 2025, shows China's progress in deep-sea
technology.
The team spent two years (2019—2021) 3 the robot's core system. 4 key innovation
(创新) is a tiny 16-gram "muscle" made of special materials (超材料) that allow flexible movements.
" 5 materials let the robot swim like a fish and crawl on the seafloor," explained Zuo Zonghao,
a team scientist. Powered by a long-lasting lithium battery (锂电池), it can work over 20 minutes at
extreme depths.
Tested 14 times with China's advanced submarines (潜水艇) like Striver, the robot set a record in
2021 by 6 10,666 meters in the Mariana Trench. During these missions, submarines released it
using robotic arms 7 areas humans cannot reach. Researchers observed it collecting sand samples
(样本) and taking photos of unknown sea creatures.
Future progress will add scientific tools like high-definition cameras and 8 sensors (传感
器). These devices will help to study underwater volcanoes, track 9 , and map mineral resources.
Scientists also plan to build a larger version for 10 missions. "Such robots could protect coral
reefs or discover ancient shipwrecks," Zuo said, highlighting their potential in marine research and
conservation.
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1. deepest 马里亚纳海沟是海洋最深的部分，故用deep 的最高级。
2. kilograms 由本句中的“Weighing”和“2.7”可知，此处应填kilogram（千克）的复数。
3. creating 句意为“该团队花了两年时间（2019年至2021年）打造这款机器人的核心系统。”“spend time doing sth”为固定句式，故填creating。
4. Its 此处指的是核心系统的关键创新，故填it的形容词性物主代词。
5. These 前文提到special materials，这里重提这些材料，应用this 的复数these 修饰materials。
6. reaching 这里指到达马里亚纳海沟10 666米深处。by 是介词，后常接动名词。
7. to explore 句意为“在这些任务中，潜水艇使用机械臂释放它，以探索人类无法到达的区域。”“探索人类无法到达的区域”是目的，故填to explore。
8. environmental 这里指环境传感器。修饰名词应用形容词，故填environment的形容词environmental。
9. pollution 句意为“这些设备将有助于研究水下火山、追踪污染和绘制矿产资源分布图。”这里的“污染”是名词，故填pollute 的名词pollution。
10. longer 句意为“科学家们还计划制造一个更大版本的机器人，用于执行时间更长的任务。”long 意为“长的”，故填long 的比较级longer。