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1·To show one's weakness is to open one's heart.

展现自己的脆弱，即意味着打开自己的心扉。

2·Thoreau says that loneliness can occur even amid companions if one's heart is not open to them.

梭罗说，一个人即使身处同伴之中，如果不对他们敞开心扉，仍会感到孤独。

3·Every one's heart is like a door with lock, you cannot open it with an iron bar.

每个人的心，都像上了锁的大门，任你在粗的铁棒也撬不开。