他知道如果他捡起普通的石子再扔下去，因为它们是冷的，他可能会捡起同样的石子几百次。
He knew that if he picked up normal pebbles and threw them down again because they were cold, he might pick up the same pebbles hundreds of times.
不管天气是冷是热，是干是湿，是好是坏，它们那疲惫的机头都会以同样的节奏上下摆动。
Their wearisome heads went up and down at the same rate, in hot weather and in cold, wet weather and dry, fair weather and foul.
那里更冷，它们受到更大压力，它们的叶绿素更敏感，并且需要更多的避光措施。
It's colder there, they're more stressed, their chlorophyll is more sensitive and it needs more sunblock.
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