单词	transition-metal
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随便看	it's no use (doing something) it's now or never it-s-now-or-never it's only fair it-s-only-fair it-s-own-lookout it's raining cats and dogs! it-s-raining-cats-and-dogs it's safe to say (that) it-s-safe-to-say-that it stands to reason it-stands-to-reason it stands to reason (that) it-stands-to-reason-that it's/that's the story of my life it-s-that-s-the-story-of-my-life it's the least I can do it-s-the-least-i-can-do it's the same old story it-s-the-same-old-story it's the thought that counts it-s-the-thought-that-counts (it's) too bad that it-s-too-bad-that it's tough at the top