Stay away from all these substances if you want a good night's sleep.
远离这些产品，如果你想获得好的睡眠。
We must develop all the natural substances in our country which can make us rich.
我们必须开发我们国家中可以让我们过上富足生活的一切自然资源。
Like all natural substances, it is easily broken down by bacteria.
像所有自然物质一样，这个很容易被细菌分解。
All these substances have been shown to affect fertility.
所有这些物质已经被证明能够影响生育。
All these substances have been shown to affect fertility.
所有这些物质已经被证明能够影响生育。
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