Unit 1 Nature in the balance Welcome to the unit & Reading 课件-2023-2024学年高中英语译林版（2020）必修第三册

Welcome to the unit & Reading (I) Unit 1 Nature in the balance Lead-in What pops into your mind when we talk about “balance of nature”? Predator and prey interactions(捕食者和猎物的相互作用) Predator and prey interactions(捕食者和猎物的相互作用) predator and prey balance Human intervention Lead-in What does the concept “balance of nature” convey? The expression is often used one of the two ways. Sometimes the balance is depicted as fragile, delicate, and easily disturbed. Other times it’s the opposite—that the balance of nature is so powerful that it can correct any imbalances on its own. Lead-in Let us not, however, flatter ourselves overmuch on account of our human victories over nature. For each such victory nature takes its revenge on us. —Fredrich Engels Welcome to the unit Listen to the song! Welcome to the unit What are the rhyming words in this song? harm/alarm; seas/trees; clean/green; above/love; pollution/solution. How do you understand “harm” and “alarm” ? “Harm” means something bad we have done to the earth, including polluting soils and seas, cutting down too many trees, etc. “Alarm” means the signal that warns us of the dangers of environmental damage, which urges us to find a solution. Pre-reading What plants or animals do you know about? What is special about them? The cheetah is a large cat native to Africa and central Iran. It is the fastest land animal, estimated to be capable of running at 80 to 128 km/h (50 to 80 mph) with the fastest reliably recorded speeds being 93 and 98 km/h (58 and 61 mph), and as such has several adaptations for speed, including a light build, long thin legs and a long tail. The cheetah is active mainly during the day and hunting is its major preoccupation, with peaks during dawn and dusk. It feeds on small- to medium-sized prey. Para. 1: Introduction to the Amazon rainforest Para. 2: Basic information about the rainforest Para. 3: _____________________________________ Para. 4: ______________________________________