Two scientists walk into a bar. 3 [3 @5 i A7 M6 d; E, Y( ]. e$ p$ e; l- z0 T5 s3 N! I1 s2 G, `
The first one says, "I'll have some H2O." 1 G, @- j: k3 z9 v1 O 0 ^2 {2 c3 \$ E2 h' V: N! sThe second says, "I'll have some H2O, too." then dies.1 I' z4 l' |+ n# w. M
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看懂需要有点化学小常识